Previously Flight aware was american based, but now has Australia, you can search flights, watch them live, this includes all aircraft including non ADS-B equipped craft, that we could not previously see on on flight radar 24, or Planefinder.net
This includes Qantas 767's, POLAIR 61, Rescue 65
For a live map of Perth see here
http://flightaware.com/live/airport/YPPH
Selecting an Aircraft will give you all its information, including route, and Rego in some (Instances these may not be available)