I've a got a People Picker on a custom list form, and I'm trying to restrict the people you can select in it. Basically, if the form is in one state (set in Page_Load), then restrict the people that can be selected to one Sharepoint group, if it is the second state, select from a different Sharepoint group.
Is this at all possible, or is any restriction of a People Picker something that needs to be set in the corresponding list field?