FWICT, at the University of Queensland Engineering faculty this looking the other way for international students doesn't appear to happen. I can't speak for other faculties.
I was stunned by the shear audacity of one recent attempt to cheat. It was a group project involving designing and building a hardware / software thingy. The idea was to pull in students from multiple Engineering disciplines I think. This particular group had both Australian students and overseas.
Like all such groups some did some work, others didn't and in this particular case there wasn't enough of the former so things weren't going well. On the due date they had to drop off the the project at a project room, which was locked up until evaluation day. One of the international students decided to break in and continue work. This involved breaking glass windows, jimmying doors, and turning the lights on. Naturally enough security noticed and put a quick end to it - but not before the submitted project was in pieces.
That made evaluating the project in the normal manner near impossible, so they put together a panel designed to feel like the Spanish inquisition and quizzed each student on their contribution for a hour or two. They passed one and failed the others - including the international students.
I went to UQ myself many years ago, back when it was only Australians who attended, and we also got up to some shenanigans. No country breeds only angels. My student cohort did things that were equally bad. The major one was discovering a security flaw in the PDP 10's operating system (TOPS-10), and using it to crash the system repeatedly so we could get the a little more time on the assignments. It didn't go down so well as that same PDP 10 was used to run the Uni's administration, and so it took out things like payroll. They had no idea who did it and no way of finding out, but needed to put an end to it very quickly. I thought they handled it very well. They put the usual suspects in a room, said no one would be punished, but they really needed to know how it was being done. They didn't have much choice I guess, as everyone in the room knew how it was done but no one was going to admit to doing it.
I can't really say which of these two crimes caused the most damage - the one by the Australians or the international student. But I suspect in the eyes of the Uni the international one suffered from a far bigger flaw than damage or inconvenience - it was just plain stupid in a way I had never seen in my day.