Code:

on *:START:{ 
  server -pfo server1 -jn #room1,#room2
  server -pfom server2 -jn #room1,#room2
}

on *:CONNECT: {
  if (($server == server1) || ($server == server2)) .msg Nickserv identify pass
}


In the CONNECT event, I would use the network names instead of server names.

if (($network == network1) || ($network == network2)) .msg Nickserv identify pass