Karyn, to start, you will need to obtain an order from VCAT that the premises have been abandoned pursuant to s241 above.
As the tenant has abandoned the Property, once you obtain an order confirming this.. there is no need for a separate possession order.
You can seek payment of unpaid rent now... to the periodic date of the lease.. rent was most likely payable on a monthly basis (you need to work out what day of the month this was)... you can obtain this from the date of expiry of the last written lease that was signed...
RESIDENTIAL TENANCIES ACT 1997 - SECT 39
Accrual of rent
For the purposes of this Act, rent under a tenancy agreement accrues from day to day and, subject to section 242, is recoverable or refundable accordingly.
Then if unable to obtain the rent directly, you can ask for it from the bond, as well as $$ to bring property to the proper state of condition (hopefully there is enough to cover the amounts owed..).. if not you will need to decide if you want to chase the tenant for any additional sums.
The current condition of the property, may need to be inspected... to verify (so all is above board).