Playing in the NBL is an unlikely proposition, for the following reasons.
a) An owner playing for a team is reasonably problematic, and is it even allowed? In theory, the boss who could make decisions over their teammates status. MJ had to give up his ownership stake while playing for the Wizards, did he not? This is Australia though, where conflicts of interest (and this potential unethical behaviour and corruption) are all above board, so maybe it could happen.
b) Playing for a different team in the NBL, while owning another. A laughable proposition, I cannot imagine being this blissfully unaware of how the world works. If you posted this, you should lose the right to vote in Australia until you complete a Billy Madison-style do-over of your schooling.