Online gambling in Australia is regulated by the Interactive Gambling Act 2001 (the IGA). The IGA makes it an offence to provide certain gambling services to a customer physically present in Australia via the Internet. Exceptions exist for licensed services that provide online wagering, sports betting and lotteries.
Yes, you can gamble online in Australia. Some services such as sports betting and lotteries are perfectly legal. Others such as online casinos and pokies are not allowed to operate in Australia, but there are still many sites that do.