It is not clear from the photo whether this is a single plant with many flower stalks or several plants growing close together. Nor can I see any evidence of cobwebby hairs when I blow the photo up. Xerochrysum subundulatum grows as single plants, is covered in cobwebby hairs, and grows in colonies at high altitudes. Xerochrysum palustre grows as single plants in colonies, is mostly hairless, and grows in swampy areas at lower altitudes. It is rare and I would not be prepared to ID this photo as palustre unless an expert IDd a specimen. The other possibility is bracteatum, which is multi-stemmed, does not grow in clumps, has rough leaves, has been recorded from Namadgi, but does not really look like this photo,
There were hundreds, if not thousands of flowers and this was on the old Ginini ski slope, so I thought the likelihood was Xerochrysum subundulatum. Apologies for not getting more detailed photos.