Hi there..I just relocated to Singapore from Sydney and am in a similar situation. I'm no tax expert, but had the benefit of a tax briefing before I left from some tax specialists. Essentially they told me that any losses that I incur through negative gearing of an investment property
will be there as a 'loss' until I come back. ie. when you go back to Australia, that first year, you can call in the losses against the income that you earn when you are back. While you are here, you still need to put in Australian tax returns each year and do the normal claiming of expenses and deductions relating to the properties. However, if you have broken tax residency with Australia, the tax rates are slightly different (basically you don't get the beenfit of the tax-free threshold on the first couple of thousand dollars of income).
Hope this helps. Again, I'm not a tax person at all, so could be useful for you to check out this info with your accountant back home. Good luck.