Tribe is not really a meaningful  or useful word in the Australian context.  Clan is not applicable to many Australian groups either. As a linguist I prefer to talk about 'language groups' as this is, in many cases, the highest level of group affiliation (altho people from different language groups can have ceremonial, and other, ties).

Someone (Ezeu) moved yamaji to the list of tribes, but I'm going to remove it. Yamaji is the word for 'man, human being' in Wajarri and is also one of the words used for that meaning in Badimaya. As such it, like ngayarda in the Pilbara and Koori in south-east Australia is used to refer to Aboriginal people from a particular region (the Murchison-Gascoyne region of WA), but may also be used to refer to Aboriginal people from any part of Australia. It's not a 'tribe' in any sense that I can determine.