No, an item sold across the 'net is still being sold to Australia, and beholden to the Consumer Rights.

However, you're pretty much guaranteed to get nowhere unless the company, or a subsidiary, resides within Australia.

But, if in doubt, report to the ACCC, they handle the legal legwork for you, even to see if you have a case.

EDIT: I've had a few Arduinos from dealxtreme be shoddy. The ACCC got them to send replacements.