Actually I would beg to differ that international places would fall too much because of the Indian attacks. You'll still get international students coming in. After all, education is a very precious and very big export in Australia. I would, however, agree that international places would fall because of the high Aussie dollar since living costs here would have soared since the last year.
Having said that, I'm not entirely sure how the selection process works for international students and local students but as you may already know, universities are cash-strapped right now and if more than anything, they would much rather offer more international full-fee places. I do know however, that some universities do set aside places for international students and make sure that they fill a certain quota. But like I said before, I'm not entirely sure of the actual process that goes behind it.