You really should see an accountant as this could be a complex matter.
As you are on a Temporary Visa it is possible that you meet the definition of a Temporary Resident subject to a few tests and potentially a Double Tax Agreement.
If you do meet the definition of a Temporary Resident , but for the exception of Taxable Australian Property (a term defined in the 1997 Act) capital gains are exempt.
Have a look at the following link for some more info, but I highly reccomend you see an acvountant as this is an area that csn become quite complex based on your circumstances and no answer on a public forum will be sufficient to cover off on the issues relevant to your circumstances.
