If you want to work while you are studying in Australia , you will need to get a Tax File Number (TFN). Employers should not give you a job unless you have a tax file number. You can apply for a TFN on line using the following Australian Tax Office Government link: Apply on line for a Tax File Number https://iar.ato.gov.au/iarweb/default.aspx?pid=4&sid=1&outcome=1
If you are not sure how many hours you can work while in Australia , you need to check what type of visa you hold. Go to the Department of Immigration and Citizenshp (DIAC) website to find out if your student visa allows you to work, and if so, for how many hours per week. The link is http://www.immi.gov.au/students/
Unfortunately, many jobs, especially government jobs require you to be an Australian citizen or permanent resident before you can apply for such jobs. This is usually stated in the job advertisement.
Here are some useful employment websites:
