The Poecilasthena are all rather similar. The distinguishing brown forewing costa of P. pulchraria is not very evident in this photo, but the oblong dark dots are good.
A concern for me is that the hindwings do not seem to have an angular margin as they do for all the P. pulchraria specimens illustrated by Moths of Victoria, Part 3.- although neither does the specimen on CNM already IDed as this species.
I believe this one, and also the one currently identified as P. pulchraria, are both a Scopula species. They both lack the dark costa and hindwing angular margin.