If a couple's life together becomes painful and hurtful to each of them and to their children, it might be wise for them to separate. It is advisable in this case they avoid using lawyers and getting courts involved. The adverse psychological effect of legal battles would cause deep wounds, which might never heal. The worst part is that the psychological damage would most probably affect their children as well. There are non-profit organisations, which can help.
The Australian National Imams Council developed the Centre for Arbitration and the Resolution Disputes Ltd (CARD). CARD is a service to assist people in the Islamic Communities of Australia by facilitating the resolution of marital disputes. CARD facilitates Islamic mediation and arbitration to assist and advise both parties to identify which is the more appropriate process for the resolution of their dispute in accordance with Islamic Law and in consistency with the Australian legal system. http://www.card.org.au/
In the Australian legal system, the distribution of property between separated couples depends on a few factors, like the contribution of each party in owning this property and their needs for the property after separation.
The financial responsibility of each parent on supporting their children after separation depends on the income of each parent and their role and involvement in the children's lives. Child Support Payments are managed by Services Australia.
https://www.servicesaustralia.gov.au/individuals/child-support