Okay, let's clarify something.
The AU version does not censor boobies or the actual "footage" you would see
What it does is remove your ability to select an affirmative response when you are offered sex as a reward
What does this mean? It means that when you are in a situation when one of the NPCs offer the chance to "join them in the bedroom in return for doing them X favour", Geralt automatically declines. id est, you do not get to choose yes or no.
Could we clarify what exactly should be happening in the dungeon scene to be sure its censored?
I have my installed copy of TW2 purchased from EBGames Australia next to an "international" copy and other than those 2 files I'm not seeing any differences.
I haven't checked the exact content of all the files of course. But all the files (other than the 2 listed above) in the CookedPC folder both add up to 10,905,305,421 bytes, so I figure if they're both the exact same number of bytes then chances are the files are identical, though maybe they aren't. If I know exactly what should be happening I could start exchanging files and load up a save at the correct point to check if its changed.