1. Court will not investigate whethet you really stayed seperated or not if both of you jointly mention in the MCDE petition that both of you stayed seperately after 7 days of your her takingt to Australia..In that case, you both of yopu shall have to state where in Australia did she stay 7 days after arriving at Australia with you. However, if you have a trust defiucit on your wife and apprehend that your such statement made along with your wife might put you in legal distress, then you can put your foot down and insist for filing the MCD after one year of her returning to India.
2. If your wife any crimibnal case against you then Indian law will not be applicable on you for your acts in Australia, if alleged. However, even in that case, it will be prudent on your part to attend the hearing if you get summons and then avail leave of the Court to abstain from appearing on every day's hearing since you stay abrod and not a cotizen of India
3. The Divorce decree passed by foraign court, unless against a MCD petition jointly signed by both of you, shall not be considered as valid in India. Even MCD decree passed by the foreign court is required to be validated by appropriate District Court in India.
4. You can if the concerned Court has the Skype facility and that too after taking leave from the Court.
5. If she is employed, then ordinarily she is not entitled to any aliminy. If not employed, she willm be entitled to maintenance from you amount for which will be decided by the Court.