um it's

on @*:text:*:#:

but that is for the bot or who ever is running the code. for the nicks triggering the code it's

if ($nick isop #)

or

if ($nick(#,$nick,o))

here is a one i made awhile back using hash...

#Peak off
on $@*:text:/^@peak$/iS:#:if ($nick isop #) msg # $iif(!$hget(Peak,$+($network,#)),Sorry No count yet.,Most users on04 # was04 $hget(Peak,$+($network,#))) 
on !*:join:#: { 
  if ($nick(#,0) > $gettok($hget(Peak,$+($network,#)),1,32) || !$hget(Peak,$+($network,#))) { 
    .hadd -m Peak $+($network,#) $nick(#,0) Users on04 $date(m/d/yy) at04 $time(h:nn tt) 
    msg # !!New User Peak Record Reached!! In04 # With04 $hget(Peak,$+($network,#)))
  } 
}
#Peak end
on *:start:{ $Peakstartup } 
on *:connect:{ $Peakstartup }
on *:exit:{  $Peakclose } 
on *:disconnect:{ $Peakclose }
alias -l Peakclose { .hsave Peak $qt($scriptdirPeak.hsh)  } 
alias -l Peakstartup {  
  if (!$hget(Peak)) { .hmake Peak 100 } 
  if ($exists($qt($scriptdirPeak.hsh))) { .hload Peak $qt($scriptdirPeak.hsh) } 
}
menu Channel,menubar {
  .Turn Peak $iif($group(#Peak) = On,Off,On): $iif($group(#Peak) = On,.disable,.enable) #Peak | echo -a Peak Script is now $group(#Peak)
}