The Pharmaceutical Encyclopedia shows that pharmacies in Australia are mostly franchises of retail brands offered by the three major pharmaceutical
wholesalers in Australia — Australian Pharmaceutical Industries (API),
Sigma Company, and Symbion Health. (via australia.coop)

The Australian Community Pharmacy Authority regulates how a pharmacist can
apply for approval to supply pharmaceutical benefits at particular
premises. The pharmacy location rules  prescribe location-based
criteria that must be satisfied in order to establish a new pharmacy or
relocate an existing pharmacy.

Registration of pharmacists is regulated by the Australian Pharmacy Council.