I'm not exactly sure what you want but try this:
Code:
  
on ^*:JOIN:#fusion: {
  if ([*]-Server iswm $nick) { 
    echo -s Join: $nick
    haltdef
  } 
}
on ^*:PART:#fusion: {
  if ([*]-Server iswm $nick) {
    echo -s Part: $nick 
    haltdef
  }
}
on ^*:QUIT: { 
  if ([*]-Server iswm $nick) {
    echo -s Quit: $nick 
    haltdef
  }
}