Djulpan is a Yolngu figure of northeast Arnhem Land, and it is a canoe. The stars the Greek list calls Orion's belt are three brothers sitting in it; the sword is the fish they caught, or the flame of their fire; the surrounding stars are the canoe itself.
The account is about a rule. The brothers took and ate a fish that was forbidden to them, and the sun took them and their canoe up into the sky, where they remain. Told this way the constellation is not a picture of a canoe that happens to be in the sky. It is a record of what happened when a prohibition was broken, permanently visible, and it is the kind of story that does work: the sky itself carries the sanction.
The canoe rises in a particular orientation at a particular season, and its appearance is tied to the calendar of the Yolngu year, in which the sky and the winds and the flowering of particular plants are read together rather than separately.
Comparing it with Orion is useful only up to a point. The same seven or so stars are a hunter with a belt and a sword in the Greek reading, a woman standing in the Arabic reading, Osiris in Egypt, and three brothers in a canoe here. The stars do not suggest any of these. They are a fairly bright cluster of points, and everything else is put there by the people looking.