I have used a Client Event to assign an activity to a Role, which successfully creates worklist items for each user in the role.  What I want to do, more for an exercise than any business need, is to allow a user to 'Claim' said workitem, which removes it from everyone else's work list.  To do this, I've made a 'Claim' outcome of ...

I could redirect a worklist item to someone else. I would like to know, 1) I can redirect to anyone?2) Could it be only redirect to someone who might be one of destination users?3) Could this function to be limited to only allowed users?