I'm trying to limit by stream to a specific user or set of users. I'm entering the user IDs  like so:
class Listener(tweepy.StreamListener): Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
                                                                                         Â
  def on_status(self, status):                                                                         Â
                                                                                                                                                                    Â
    try:                                                                                                                                       Â
      print "%s\t%s\t%s\t%s" % (status.text,                                                        Â
                            status.author.screen_name,                                                 Â
                            status.created_at,                                                     Â
                            status.source,)                                                      Â
                                                                                         Â
    except Exception, e:                                                                           Â
      print >> sys.stderr, 'Encountered Exception:', e                                                           Â
      pass                                                                                 Â
                                                                                         Â
  def on_error(self, status_code):                                                                       Â
    print >> sys.stderr, 'Encountered error with status code:', status_code                                                  Â
    return True # Don't kill the stream                                                                    Â
                                                                                         Â
  def on_timeout(self):                                                                             Â
    print >> sys.stderr, 'Timeout...'
try: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
   streamer = tweepy.streaming.Stream(auth, Listener(), timeout=60)                                                       Â
  streamer.filter(follow=[523460971,23595586], track=["traffic"])                                                     Â
                                                                                         Â
except KeyboardInterrupt: Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
  print "\nGoodbye..."                                                                             Â
  exitÂ