diff --git a/CHANGELOG.md b/CHANGELOG.md
index e4a214ca09..2ce714e457 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -5,7 +5,7 @@
 * API:
     * Major endpoint changes:
         * Add trailing slash to _all_ endpoints' paths (\#1003).
-        * Add new monitoring endpoints restricted to superusers at `/monitoring` (\#947).
+        * Add new monitoring endpoints restricted to superusers at `/monitoring` (\#947, \#1009).
         * Add new `GET` endpoints `api/v1/job/` and `api/v1/project/{project_id}/workflow/{workflow_id}/job/` (\#969, \#1003).
         * Add new `GET` endpoints `api/v1/dataset/` and `api/v1/workflow/` (\#988, \#1003).
         * Add new `GET` endpoint `api/v1/project/{project_id}/dataset/` (\#993).
diff --git a/fractal_server/app/routes/monitoring.py b/fractal_server/app/routes/monitoring.py
index 07c39c7290..b03ce02385 100644
--- a/fractal_server/app/routes/monitoring.py
+++ b/fractal_server/app/routes/monitoring.py
@@ -16,12 +16,12 @@
 from ..models import JobStatusType
 from ..models import Project
 from ..models import Workflow
+from ..models.security import UserOAuth as User
 from ..schemas import ApplyWorkflowRead
 from ..schemas import DatasetRead
 from ..schemas import ProjectRead
 from ..schemas import WorkflowRead
 from ..security import current_active_superuser
-from ..security import User
 
 
 router_monitoring = APIRouter()
@@ -60,6 +60,7 @@ async def monitor_project(
 @router_monitoring.get("/workflow/", response_model=list[WorkflowRead])
 async def monitor_workflow(
     id: Optional[int] = None,
+    user_id: Optional[int] = None,
     project_id: Optional[int] = None,
     name_contains: Optional[str] = None,
     user: User = Depends(current_active_superuser),
@@ -76,6 +77,10 @@ async def monitor_workflow(
     """
     stm = select(Workflow)
 
+    if user_id is not None:
+        stm = stm.join(Project).where(
+            Project.user_list.any(User.id == user_id)
+        )
     if id is not None:
         stm = stm.where(Workflow.id == id)
     if project_id is not None:
@@ -96,6 +101,7 @@ async def monitor_workflow(
 @router_monitoring.get("/dataset/", response_model=list[DatasetRead])
 async def monitor_dataset(
     id: Optional[int] = None,
+    user_id: Optional[int] = None,
     project_id: Optional[int] = None,
     name_contains: Optional[str] = None,
     type: Optional[str] = None,
@@ -114,6 +120,10 @@ async def monitor_dataset(
     """
     stm = select(Dataset)
 
+    if user_id is not None:
+        stm = stm.join(Project).where(
+            Project.user_list.any(User.id == user_id)
+        )
     if id is not None:
         stm = stm.where(Dataset.id == id)
     if project_id is not None:
@@ -136,6 +146,7 @@ async def monitor_dataset(
 @router_monitoring.get("/job/", response_model=list[ApplyWorkflowRead])
 async def monitor_job(
     id: Optional[int] = None,
+    user_id: Optional[int] = None,
     project_id: Optional[int] = None,
     input_dataset_id: Optional[int] = None,
     output_dataset_id: Optional[int] = None,
@@ -173,6 +184,10 @@ async def monitor_job(
 
     if id is not None:
         stm = stm.where(ApplyWorkflow.id == id)
+    if user_id is not None:
+        stm = stm.join(Project).where(
+            Project.user_list.any(User.id == user_id)
+        )
     if project_id is not None:
         stm = stm.where(ApplyWorkflow.project_id == project_id)
     if input_dataset_id is not None:
diff --git a/tests/test_monitoring.py b/tests/test_monitoring.py
index 7cb3a72734..fa2cd53cdd 100644
--- a/tests/test_monitoring.py
+++ b/tests/test_monitoring.py
@@ -92,14 +92,24 @@ async def test_monitor_workflow(
 
     async with MockCurrentUser(
         persist=True, user_kwargs={"is_superuser": True}
-    ):
+    ) as superuser:
+        project3 = await project_factory(superuser)
+        await workflow_factory(project_id=project3.id, name="super")
+
         # get all workflows
         res = await client.get(f"{PREFIX}/workflow/")
         assert res.status_code == 200
+        assert len(res.json()) == 4
+
+        # get workflows by user_id
+        res = await client.get(f"{PREFIX}/workflow/?user_id={user.id}")
+        assert res.status_code == 200
         assert len(res.json()) == 3
 
         # get workflows by id
-        res = await client.get(f"{PREFIX}/workflow/?id={workflow1a.id}")
+        res = await client.get(
+            f"{PREFIX}/workflow/?user_id={user.id}&id={workflow1a.id}"
+        )
         assert res.status_code == 200
         assert len(res.json()) == 1
         assert res.json()[0]["name"] == workflow1a.name
@@ -169,10 +179,22 @@ async def test_monitor_dataset(
 
     async with MockCurrentUser(
         persist=True, user_kwargs={"is_superuser": True}
-    ):
+    ) as superuser:
+        super_project = await project_factory(superuser)
+        await dataset_factory(
+            project_id=super_project.id,
+            name="super-d",
+            type="zarr",
+        )
+
         # get all datasets
         res = await client.get(f"{PREFIX}/dataset/")
         assert res.status_code == 200
+        assert len(res.json()) == 4
+
+        # get datasets by user_id
+        res = await client.get(f"{PREFIX}/dataset/?user_id={user.id}")
+        assert res.status_code == 200
         assert len(res.json()) == 3
 
         # get datasets by id
@@ -206,7 +228,9 @@ async def test_monitor_dataset(
         assert len(res.json()) == 0
 
         # get datasets by type
-        res = await client.get(f"{PREFIX}/dataset/?type=zarr")
+        res = await client.get(
+            f"{PREFIX}/dataset/?type=zarr&user_id={user.id}"
+        )
         assert res.status_code == 200
         assert len(res.json()) == 2
         res = await client.get(f"{PREFIX}/dataset/?type=image")
@@ -270,6 +294,14 @@ async def test_monitor_job(
         assert res.status_code == 200
         assert len(res.json()) == 2
 
+        # get jobs by user_id
+        res = await client.get(f"{PREFIX}/job/?user_id={user.id}")
+        assert res.status_code == 200
+        assert len(res.json()) == 2
+        res = await client.get(f"{PREFIX}/job/?user_id={user.id + 1}")
+        assert res.status_code == 200
+        assert len(res.json()) == 0
+
         # get jobs by id
         res = await client.get(f"{PREFIX}/job/?id={job1.id}")
         assert res.status_code == 200