Agree Helicoverpa punctigera. Took more equally poor photographs today, and Google claimed it was H punctigera from the best of them. As well as this location, they were on many of the flowering hybrid grevilleas in the adjacent reserve, but did not see any on local native Grevillea lanigera.
Assuming this moth belongsed to the genus Gliphipteryx, I could not find a named native species which matches it. Similar to G, phosphora but does not seem to match that species. A better match is Grapholita zapryna (Tortricidae), but again the match is not as precise as it perhaps should be. Given this is a very sharp, clear image, it may be an undescribed species which would warrant collection if seen again. An introduced species perhaps? I think a new 'Grapholita (genus)' category is probably warranted.
Visiting, I witnessed roughly 50 moths circling trapped inside my mothers house at Mollymook on the coast, and easily a 100 more emerged from her cottage garden when she hosed it at the end of a hot breezy day, last 24 th / 25 th Sept. For the next 2 to 3 days we trod carefully because they kept coming and dozens died in and around the house. (No spraying so I wondered if they were heat exhausted or perhaps had laid their eggs and expired. Also the temp dropped markedly on Friday.) Large numbers in the area so as pointed out above, these particular travellers may not have reached the Mts at all.