Not sure this is Phazaca interrrupta but pretty sure its a Phazaca (genus) species (family: Uraniidae). There are other Australian Phazaca species. P. interrupta has mainly northern half of Australia distribution, but it has been recorded in Victoria so its not an unreasonable assumption for now. I don't see the white tips to the antennae that P, interrupta has on LBH, and the ALA.
It's almost certainly P. interrupta. No other member of it's subfamily Epipleminae has been recorded as far south as ACT. And it seems the same as other CNM records put under P. interrupta