Code:
on *:START:{
  server server1.network2.com -nNick1,Anick1 -j#chan1,#chan2
  server -m server2.network1.com -nNick2,Anick2 -j#chan1,#chan2
  server -m server1.network2.com -nNick3,Anick3 -j#chan1,#chan2
}

on *:CONNECT:{
  if (($network == network1) && ($me == nick1)) /identify1
  elseif (($network == network1) && ($me == nick2)) /identify2
  elseif (($network == network2) && ($me == nick3)) /identify3
}

(untested)

-genius_at_work