Dec 02, 2015 - 12:37 PM
What I understood from your query is that ‘If you select one option from the dropdown which is basically a group of users(like Dev team, QA team) then it should expand and show all the users within that group. If this is the case then It is not possible to have this type is only valid in any process template for the Area and Iteration fields.
If you are using any customized process template where for any customized field this expansion of usernames in a group for a dropdown is displaying then please share us that process template and\or the Snapshot.
As far as I know this tree or expansion is only valid for the Area and Iteration path fields of any process template.