I am not sure what you want to do, but if you want to write a private message to all ov, you could use $chan.users with flags aovh perhaps also u, not sure about that. http://www.kvirc.de/docu/fnc_chan.users.html

With $chan.users you get an array of all users you want, and with foreach you may go trough them http://www.kvirc.de/docu/cmd_foreach.html