Yes, the species is strongly sexually dimorphic.. Even so, the male has a slight point to the hindwing which is present on specimens I see online and apparently absent in your specimen.
Its quite a quite variable species but i think this is a female Dodonaea Moth Parosteodes fictiliaria. Photos of the male D. australiaria show it does not have smoothly curved trailing edge to the hindwing- it has a soft point.