Pretty much anywhere except for deserts (except in river valleys), ice caps, and tundras.
First of all, we need to determine what crops are available to your people. You provided three regions with identical crops: Southeast Asia, New Guinea, and Australia.
Here is a list of staple foods available in these three areas: Asian rice, Job's Tears, lesser yam, air potato, white yam, taro, bananas/plantains, breadfruit, kangaroo grass, and murnong.
All of the above crops grow in tropical/subtropical climate conditions except for kangaroo grass and murnong, which grow in more arid conditions.
The only areas on the map that do not fit this description are deserts (outside of river valleys) and ice/snow covered areas.
The most economically valuable of these staple foods are likely going to be grains, as they last the longest in dry conditions. These include Asian rice, Job's Tears, and kangaroo grass. Asian rice is the most productive of these three crops, which grows in tropical and subtropical regions.
Potential animal domesticates are the water buffalo, Bali cattle, and the now extinct diprodont.
Inhabitants of the desert and tundra regions not near river valleys would likely survive through pastoral nomadism, herding Bali cattle for milk and meat through the desert while gathering food in the wilderness.
The ice cap regions would likely be uninhabited, as they are largely lifeless.