Use the Creator/Editor filter to check who created or revised the Podio Item that triggers the flow.
For example: If you want to set restrictions on who can make edits on an Item, you can add this filter.
Select the flow Trigger and add this Creator/Editor filter.
This flow will now be triggered every time the Current Revision User is not equal to "Angela Scott".
Complete flow by adding Actions to complete your workflow steps.
See this in action in our blog post, Creating an Un-Editable App