If you are on any temporary or provisional visa, you can drive on your Philippines licence as long as it is still valid.
If your licence is not in English, you must also have an International Driving Permit (IDP) and must carry it and your licence at all times when you are driving - IDPs can only be obtained in the country in which you obtained your license.
http://www.rta.nsw.gov.au/licensing/visi... Information for visitors and temporary residents
If you have a permanent residence Australian visa, you then have 3 months in which to obtain a NSW license - after that, you will be considered to be driving unlicensed.
Because your licence was obtained in the Philippines which is not a recognised country for licensing purposes, you will be required to undergo a driving and a driver knowledge test.
http://www.rta.nsw.gov.au/licensing/newt... NSW licence for international drivers
http://www.rta.nsw.gov.au/licensing/newt... Recognised countries
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