Yeah I'm from Australia and I don't thinks its legal to grow or smoke in any state. I've heard rumors that its decriminalized in the state of South Aust. But I think that some states just have more relaxed laws. There have been news articles recently about strengthening state laws in regards to growing and possesion even further. This has something to do with too many people ending up with psychosis and filling up the mental heath system. I agree to a point but think that most of these patients also 'dabble' in amphetamine use and or start smoking when they are way too young.
Here are the links to the news stories.
http://www.news.com.au/story/0,10117....html?from=rss
http://www.news.com.au/story/0,10117....html?from=rss