It looks like you would need to /whois the person when they join the channel in order to get their login status.

Could try this script:

Code
on *:join:#Alessandra:{
  if ($network == MindForge) {
    if (MindUser* iswm $nick) { return }
    whois $nick
  }
}
; User is logged in, +v them.
; :Unixverse.MindForge.org 330 TestNick KindOne KindOne :is logged in as
raw 330:*:{
  if ($network == MindForge) {
    if ($2 ison #Alessandra) { mode #Alessandra +v $2 }
  } 
}