I need to create a SharePoint 2013 field that only accepts groups (from SP, not AD). I know I can add
UserSelectionMode="PeopleOnly" to make it accept only people, but I want the opposite. Is there any way I can accomplish this? Thanks!
EDIT1: Just to clarify, I do not want to pick users from a specific group, but select "SPGroup"s from a people picker control
EDIT2: Thanks for all the help! For now, I'm gonna go with an event receiver to validate the value against the groups of the site. Maybe I'll change to the
PrincipalAccountType solution later.