This condition checks if a user in a specified field is in the specified role.
To add the User Role Condition (Within a Specified Field)
Go to the transition of your workflow, switch to the Conditions tab and click on the Add Condition button.
Select JEP - User Role Condition (Within a Specified Field) and then click the Add button.
Select user field/custom field and the project role. Then click the Add button.
That's it, the condition will now be added to the transition.
Please do not forget to publish the workflow.