Ok so 'consent orders' are by agreement. So I'm just a bit concerned here about your information Samantha, either the father agreed 'by consent', or the courts ordered the father to continue paying child support for the adult while they were at uni.
It always worries me when information is provided based on conversations between friends etc rather than on any basis of the law.
So in Victoria it isn't called 'maintenance' rather than child support. The child support system is a federal system run by the federal govt. If that were not the case then the easiest way to avoid paying it would be to move states.
Now I also doubt a court will determine child support beyond the normal rules except where a child has a permanent disability.
There are clear rules about when the child support agency can vary the rules. They can b found at
4.3.2 Applications & Orders about Decisions under the CSA Act | Child Support Guide
Look under this sub-section "
Application for a change to a child support assessment in special circumstances (section 116)
So, I'm gonna read between the lines... So I'm assuming the orders were by 'consent', which means dad agreed. So Dad agreed to pay beyond the time that he had to. Sounds like a nice bloke. Everything your mate was saying about him gloating sounds more like a vindictive ex. Dad agreed by consent, nice. Mum twisted it to claim he is gloating not nice.
So one last thought you wrote "I'm not sure of the actual acts/rules". Look folk come here looking for help about stuff. In this case the poster wanted to know if an adult child could still have a claim for child support. The rules are very clear the answer is no. The only way child support might be payable is if the non-primary parent agreed.
It think it is really important that information be based on knowledge and facts rather than hearsay and second hand advice. If you were to ask my ex I'm a mean nasty person, incompetent at everything, uncaring and un-sharing, she would tell you I'm a plague on the planet and I sing bad too. She is right about the singing. And I think we need to be confident that we are right about the info we provide and be prepared to be able to provide evidence from the relevant authorities to back it up.