I am trying to make it so that each user submission of a form shows their unique userID provided in PrivateMembersData. I am using the Wix Forms currently, would it be possible to add it to their submission?
Hi David,
When you go to the collection you will see that there are a few hidden columns.
There is a column named _owner.
When a member submits a form, hese id will be there 
Was this what you where looking for?
Kind regards,
Kristof.