Hi LJC, they have unique left faces and right faces. If you have other photos that show either face more clearly I may be able to tell you which goanna this is and how long we have known it. There seem to be six Rosenberg's Goannas left in Ainslie Majura, plus there was a juvenile/ sub-adult seen a year ago (fingers crossed that it defies the odds to make it to breeding age). They wander widely, particularly the three males, so location does not tell us who it is.
Sighted after 2 day storm cleared : Northern side of Mt Ainslie, 100 metres below summit loop road, among burnt out old ( box?) gum trees with lots of hollows.