I’m not entirely sure of the limits, per se. I don’t think you can just have any gun you like. But I’m fairly sure you can store them at home.
It does slightly differ state to state, as in the outback, rifles are probably pretty common. As they are often needed for farming and protection
I do know that certain grades of weapons/guns (classified as very high powered) will soon be outlawed here or already are. It’s a fairly new law.
But I do know there are strict laws regarding storage
For reference my state has these