Hi Mick,
Currently it does not take into consideration the details from the Workfront user's info, only the details from the user's info in Workfront Proof.
We are currently working on transitioning from the SOAP api to REST api to allow us to further integrate Workfront Proof into Workfront. I do not as of yet have a hard ETA of when that will be completed, I personally am hoping for end of 2022.
Thanks!