After separation, in the majority of cases, parties need to divide their assets and liabilities, so that each can be financially independent from from the other. When relationships break down, for most people, regardless as to whether the relationship is a marriage or a de facto relationship, the Family Law Act now deals with how property should be divided up. The Division of property is commonly called a "property settlement".
Maintenance is financial support paid by one party to the other in circumstances where the first party is unable to adequately support themself, and the second party has a demonstrable capacity to pay that support of the party, not children of the relationship.
If you are in need of financial support after the breakdown of a relationship, then you should obtain advice from a lawyer about whether you would be eligible for maintenance