This condition checks if a user in a specified field is in the specified role.
To add the Check User in Specified Field is in Specified Role Condition
Go to the transition of your workflow, switch to the Conditions tab and click on the Add Condition button.
Select JEP - Check User In Specified Field Is In Specified Role Condition 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.