on 1:NOTICE:<matchtext>:*: { }
Code:
on 1:CONNECT:{ if (%nident == On) { $autoid } }
on *:NOTICE:*This nick is owned*:*:{ if (%nident == On && $nick == nickserv) { $autoid } }

alias -l autoid {
  if $findtok(%nick1 %nick2 %nickn3 %nickn4,$me,32) {
    .msg NickServ identify $gettok(%pass.1 %pass.2 %pass.3 %pass.4,$v1,32)
  }
}

Check the value of %nident