Need a bit more information. The only thing that I’m sure about is that you have a user field.
Where is the user field located? on a post, a page, term, etc.
Where is the other field that you want to populate? Is it another field in the same group or is it a field on another page somewhere?
What do you want to populate the second field with, exactly the same list of users that’s in the first field, just showing different information? or is it more complicated than then?
