This one proving difficult to ID! My best suggestion is Mythimna consanguis https://bie.ala.org.au/species/https://biodiversity.org.au/afd/taxa/1b555418-4f89-4d51-8359-1390079cbc5a#gallery If I'm accurate this sighting would be at the southern end of its known range in NSW at Moruya, but there a a few sightings on the ALA on the south coast of Victoria.