diff --git a/sdk/python/feast/diff/infra_diff.py b/sdk/python/feast/diff/infra_diff.py
index bffd655d2f5..b761470905a 100644
--- a/sdk/python/feast/diff/infra_diff.py
+++ b/sdk/python/feast/diff/infra_diff.py
@@ -1,5 +1,5 @@
 from dataclasses import dataclass
-from typing import Generic, Iterable, List, Tuple, TypeVar
+from typing import Generic, Iterable, List, Optional, Tuple, TypeVar
 
 from feast.diff.property_diff import PropertyDiff, TransitionType
 from feast.infra.infra_object import (
@@ -98,7 +98,9 @@ def tag_infra_proto_objects_for_keep_delete_add(
 
 
 def diff_infra_protos(
-    current_infra_proto: InfraProto, new_infra_proto: InfraProto
+    current_infra_proto: InfraProto,
+    new_infra_proto: InfraProto,
+    project: Optional[str] = None,
 ) -> InfraDiff:
     infra_diff = InfraDiff()
 
@@ -114,6 +116,19 @@ def diff_infra_protos(
         new_infra_objects = get_infra_object_protos_by_type(
             new_infra_proto, infra_object_class_type
         )
+
+        # Filter infra objects by project prefix when using shared online stores
+        # Table names include project prefix: {project}_{table_name}
+        if project:
+            project_prefix = f"{project}_"
+            current_infra_objects = [
+                obj
+                for obj in current_infra_objects
+                if obj.name.startswith(project_prefix)
+            ]
+            new_infra_objects = [
+                obj for obj in new_infra_objects if obj.name.startswith(project_prefix)
+            ]
         (
             infra_objects_to_keep,
             infra_objects_to_delete,
diff --git a/sdk/python/feast/feature_store.py b/sdk/python/feast/feature_store.py
index 19a86825a62..727b3a28780 100644
--- a/sdk/python/feast/feature_store.py
+++ b/sdk/python/feast/feature_store.py
@@ -78,7 +78,6 @@
 from feast.online_response import OnlineResponse
 from feast.permissions.permission import Permission
 from feast.project import Project
-from feast.protos.feast.core.InfraObject_pb2 import Infra as InfraProto
 from feast.protos.feast.serving.ServingService_pb2 import (
     FieldStatus,
     GetOnlineFeaturesResponse,
@@ -792,12 +791,13 @@ def plan(
         # Compute the desired difference between the current infra, as stored in the registry,
         # and the desired infra.
         self._registry.refresh(project=self.project)
-        current_infra_proto = InfraProto()
-        current_infra_proto.CopyFrom(self._registry.proto().infra)
+        current_infra_proto = self._registry.get_infra(self.project).to_proto()
         desired_registry_proto = desired_repo_contents.to_registry_proto()
         new_infra = self._provider.plan_infra(self.config, desired_registry_proto)
         new_infra_proto = new_infra.to_proto()
-        infra_diff = diff_infra_protos(current_infra_proto, new_infra_proto)
+        infra_diff = diff_infra_protos(
+            current_infra_proto, new_infra_proto, project=self.project
+        )
 
         return registry_diff, infra_diff, new_infra