Your Immigration Expert
Can I Secure A Partner Based Australian Visa, While Married To A Different Person
While Australians are open minded about most things they are sticklers for one relationship at a time. Or at least they are from an Immigration perspective. You will need to secure a final divorce or provide you are legally separated from your current husband.
Then you will need to show the new relationship has history and is genuine and subsisting. This would be evidenced best if you lived together or have a wedding booked in Australia within six months of your arrival.
As you are not in the same country as your Australian partner, currently married to another person this is a tough case and one that may result in a refusal. I wish I had better news but it needs to be said, so you do not expect too much.