title: ZeroMQ can subscribe, but how to exclude a specific filter?
body: <p>In ZeroMQ we can subscribe to a topic, with some filter</p>
  
  <p><code>socket.setsockopt(zmq.SUBSCRIBE, "/someRoot/")</code></p>
  
  <p>Is there a way to exclude a specific filter from being sent? </p>
  
  <p>For example, how can we exclude <code>"/someRoot/noise/"</code> from being sent?</p>
  
  <p>Sure, we can check for it on a subscriber side, but I would like to avoid it from being even sent to this subscriber in the first place...</p>
  
  <p>Is this possible with ZeroMQ?</p>