Hi Crosz,

Code:
On @*:Join:#: {
  if ($ial == $false) { 
    .ial on
  }
  if ($chan($chan).ial == $false) { 
    who $chan
  }
  var %x = $ialchan($address($nick,2),$chan,0), %clones
  if ($ialchan($address($nick,2),$chan,%x) >= 2) {
    while (%x) {
      var %clones = $addtok(%clones,$ialchan($address($nick,2),$chan,%x).nick,32) 
      dec %x
    }
    echo $chan $numtok(%clones,32) matches found: %clones
  }
}