All the property they own Down Under eventually seized?
No and Yes.
Of recent times Watchtower Bible & Tract Society of Australia Ltd ("Watchtower Australia") have been trying to give the impression that Watchtower Australia and Jehovah's Witnesses are one and the same. They are not and this was clarified during the Australian Child Abuse Royal Commission ("ARC").
Watchtower Australia's official charity activities and outcomes are confined to "supporting congregations of Jehovah's Witnesses in the practice and advancement of the Christian religion founded on the Holy Bible as understood by the denomination of Christians known as "Jehovah's Witnesses.""
Therefore Watchtower Australia is not the denomination of Christians known as Jehovah's Witnesses.
Any proposed class action lawsuit against Watchtower Australia that is launched in the state of Victoria, Australia, say in relation to privacy breaches or working with children law breaches, cannot be made against the denomination of Christians known as "Jehovah's Witnesses" because they do not exist as a legal entity that can sue or be sued. This is the Ellis Defense, i.e. you cannot sue what does not exist.
Can you sue Watchtower Australia instead? They could argue that they are not the denomination of Christians known as "Jehovah's Witnesses" but support the congregations of Jehovah's Witnesses, therefore they should not be liable for any unlawful action or child abuse committed by the religion or its members. Fair argument that is often made in courtrooms across the United States.
Worth considering, and this is what class action law firms consider, Watchtower Australia does not have the assets or insurance to cover a large class action lawsuit. They do not have large real estate holdings. Below is an extract from the latest Financial records of Watchtower Australia.

The above amount is equivalent to US$1.5 million. That is pretty much all the assets that can be seized in any class action lawsuit.
So who holds the real estate, including branch office, assembly halls, and the hundreds of kingdom halls across Australia? They are held by separate property trusts, some of which are in fact the congregations themselves but not the congregation members.
This hiding of the assets in trust funds is what the new laws in the state of Victoria, Australia, seeks to address.
Under the new laws you do not have to sue Watchtower Australia. A class action lawsuit could pursue the denomination of Christians known as "Jehovah's Witnesses."
This religion would then have to nominate an underwriter for the amount of the class action lawsuit. They cannot nominate Watchtower Australia as they do not have the assets. If no underwriter is nominated then ALL of the real estate and kingdom halls held in trust become the financial guarantee.
This is where Watch Tower Bible & Tract Society of Pennsylvania comes in. They would have to nominate themselves for any financial payment in a class action lawsuit.
With Watch Tower Pennsylvania as the underwriters the class action law firms would now be prepared to carry out a forensic audit of any proposed class actions.
To put it simply you will be able to sue the members of the religion for the "sins" (i.e. crimes) of the religion. The assets of the religion which are held in trust can now be seized.
Stay tuned.