Possibly this wedge moth species which has been similarly photographed on wattle in the ACT, see https://bie.ala.org.au/species/urn:lsid:biodiversity.org.au:afd.taxon:ae16d838-c09f-4fdb-8bfa-242b69963494#gallery. There is a similar image on Flickr calling this the 'Leopard caterpillar'.. See also http://lepidoptera.butterflyhouse.com.au/naco/cuculloides.html