Even if they have a corporate structure that seems to make the Fair Work Act not apply (say, making you a contractor of a foreign company), I'm pretty sure that the commission will still generally rule against the employer if you're effectively working as an employee and you take it to the ombudsman. So if, say, they provide office space and a computer, you work regular full-time hours and it's more than a temporary contract then it will usually be considered a sham contracting arrangement and you'll be eligible for all the standard full-time employment protections.