How to Validate User belong to specific User Role to Edit Project Definition via Workflow ?

I need to do a validation, There is a method in SECURITY_SYS.Is_Role_Granted
I need to validate if user belong to specific Roles if not provide and error when updating project definition
I have created the Custom Event to trigger the workflow.
wondering how to perform it via BPA

I have tried to.

1. Create a Custom projection to call this method is it not allowing to call returning functions.
2. Was not able to find any existing projection that archive this.