Code:
raw 352:*: {
  if ($2 == *) {
    if (!$window(@Users_not_in_channels)) {
      window -nk0 @Users_not_in_channels
    }
    echo @Users_not_in_channels $2 $6 $7 $3 $+ $4 : $+ $8 $9-
  }
}

raw 315:*: {
  echo @Users_not_in_channels $2-
  echo @Users_not_in_channels -
}

menu @Users_not_in_channels {
  Clear window:/clear @Users_not_in_channels
}