Make watchers to stop watching ticket

Hello world

I want a group to watch a queue.
when a member of this group take a Ticket, i want him to be the only
watcher on this ticket, but I still want the other wath the other Ticket.

someone understand what i mean??
is it possible?
is it hard to do?
did someone already do this?
how could i do that?
thank you
computers are not intelligent. they only think they are

Ce mel a �t� envoy� avec Meloo