.com.au
Must be a registered Australian trading entity, trademark holder or Statutory body.

.net.au
Must be a registered Australian trading entity, trademark holder or Statutory body.

.org.au
Australian not-for-profit, registered charity or unregistered clubs/associations.

.asn.au
Australian not-for-profit, registered charity or unregistered clubs/associations.

id.au
Australian citizens or residents only. Cannot be used for commercial purposes.

.ca
Must be a Canadian registered organisation and/or have a Canadian address.

More information can be found at the auDA click here