ircII help: on names

Usage: ON [#|+|-|^|&|@]NAMES [-|^]<parameters> [action]
  When NAMES is activated any outputline will be modified
  by [action].
  For example:
    ON NAMES * /echo $0 $1-

  The parameters are as follows:
    $0    name of the channel
    $1    all users on this channel