Thanks, Ian for the info. Was only looking at sightings from CMM, so that is why I chose T. amoenana. But looking at other sightings, it could be T. oriarcha.
I think its closer to Technitis oriarcha (syn. Tortrix oriarcha). While all the records of Technitis oriarcha on the ALA are from NE Victoria (presumably at altitude), Bold Systems shows records of its synonym Tortrix oriarcha fromm NSW near Canberra. The AFD recognises Tecnitis oriarchis as a species.