The flying reserve, as established post WWII, was initially four, later five, squadrons, assigned the interceptor role; the two planned regular squadrons were assigned the long range fighter role. The establishment of the reserve squadrons was to be 40% regular and 60% reserve personnel with their initial equipment being Mustangs, replaced with Vampires and Meteors, although 24 Sqn never received jets.
A very simple thought is that the RAAF maintained this mix of regular, long range figher / fighter attack / fighter-bomber and reserve interceptor, evolving into night and all weather interceptor. When the Sea Venom was selected for the RAN FAA DHA licence produced them as well as Venom NFs for the RAAF reserve. They could then go a number of ways, Javelin, Lightning, F-106, Mirage IIIC or E, Arrow, Draken, Hunter FAW, an AVON powered F-86D/K/L, CAC CA-23, or even an interceptor version of whatever bomber / reconnaissance type the regular RAAF adopted, Vigilante, Hustler, F-111,etc.