In the .au country code Top Level Domains, we have different namespaces which aim to serve different parts of the community - for example: com.au is the namespace for commercial entities, org.au is the namespace for not-for-profit entities.
Each namespace has eligibility rules which determine who can eligible to register a name in it - whether an individual or an organisation.
Each namespace also has allocation rules which determine what name an eligible registrant can have and how it needs to relate to them.
The eligibility and allocation rules for each namespace can be found in section 2.4 of the .au Domain Administration Rules: Licensing.
To be eligible to hold a domain name, you also need to have an Australian presence.
Category: Registering a name