diff --git a/.github/workflows/add_pullrequest_to_project.yml b/.github/workflows/add_pullrequest_to_project.yml
index 9ca64829c..354a936ce 100644
--- a/.github/workflows/add_pullrequest_to_project.yml
+++ b/.github/workflows/add_pullrequest_to_project.yml
@@ -5,6 +5,7 @@ on:
 
 jobs:
   add_pullrequest_to_project:
+    if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
     name: add_pullrequest_to_project
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f4fa54181..e240d82ff 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -91,6 +91,7 @@ jobs:
           USERNAME: ${{ github.actor }}
           TOKEN: ${{ secrets.GITHUB_TOKEN }}
       - name: "Docker Image: edc-dev"
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         uses: ./.github/actions/build-connector-image
         with:
           registry-url: ${{ env.REGISTRY_URL }}
@@ -102,6 +103,7 @@ jobs:
           title: "sovity Dev EDC Connector"
           description: "Extended EDC Connector built by sovity. This dev version contains no dataspace auth and can be used to quickly start a locally running EDC + EDC UI."
       - name: "Docker Image: edc-ce"
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         uses: ./.github/actions/build-connector-image
         with:
           registry-url: ${{ env.REGISTRY_URL }}
@@ -113,6 +115,7 @@ jobs:
           title: "sovity Community Edition EDC Connector"
           description: "EDC Connector built by sovity. Contains sovity's Community Edition EDC extensions and requires dataspace credentials to join an existing dataspace."
       - name: "Docker Image: edc-ce-mds"
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         uses: ./.github/actions/build-connector-image
         with:
           registry-url: ${{ env.REGISTRY_URL }}
@@ -124,6 +127,7 @@ jobs:
           title: "MDS Community Edition EDC Connector"
           description: "EDC Connector built by sovity and configured for compatibility with the Mobility Data Space (MDS). This EDC requires dataspace credentials, and additional MDS Services such as a Clearing House."
       - name: "Docker Image: test-backend"
+        if: ${{ github.event.pull_request.head.repo.full_name == github.repository }}
         uses: ./.github/actions/build-connector-image
         with:
           registry-url: ${{ env.REGISTRY_URL }}