Looking at this specimen again I'm not sure this may not be Chloroclystis testulata, given there is an image labelled C testulata in Part 3, Moths of Victoria, p. 31 which shows a near identical white wing patch pattern, and several other very similar examples shown on the ALA webpage for this species. Although the white wing pattern for C. filata is apparently quite variable also, there are none I have seen online which closely matches this pattern. Both species apperently include the ACT within range.