Is it possible to limit your player choices to only play players in any game, within your country as an automatic control? My other half is whining about Americans on xbox live. I told him if he doesn't like it he should altogether stop playing.
On certain games will allow search preferences online. I know that Call of Duty: World at War for example has opinions to search for games/players in your local area and by that I mean country before then going onto the rest of the world. Games like Call of Duty: Modern Warfare 2 do not have an opinion to search locally first.
Yes. Normally you will get into a game that is mainly full of Australian players but there may be a few players from somewhere else in there too. But as long as the host is Australian then you should have good connection.