I have a cast I took from a set of prints I found in sandy soil on my first Tasmanian visit. They were not from a dog and were difficult to ascribe easily to another native species. The prints were spaced widely apart in a long narrow line, a pattern identical to a photo of tracks which appear in Guiler's book, ascribed to Thylacine( which doesn't mean they are of course), and a couple of other photos I have seen of similar sets of tracks.
Most other marsupials make pretty distinctive tracks, either the shape of the prints, or pattern of the tracks( or both.) Tasmanian Devil is one of the easiest to rule out by its size and pattern. Wombat is more difficult but it has a wide, bear-like gait.
I don't know what my cast is from...