If you want to practice as a barrister in Australia, firstly you have to decide in which part of Australia you are interested in to practice. For example, you might want to practice in New south Wales, or Victoria or Northern territory, or in Queensland etc. due to the operation of mutual recognition provisions and the newly developed National Practising Certificate Scheme, overseas applicants who are admitted to practice in one Australian jurisdiction can usually easily gain practice rights in all other Australian jurisdictions. This applies equally to lawyers trained both inside and outside Australia. Applicants seeking admission to practice in Australia on the basis of their overseas qualifications require assessment of their qualifications and directions as to what further steps are required to meet the local requirements for admission.

So.. its easy now. For example I am doing my course under Legal Profession Admission Board (New South Wales), that means, when I will complete my course, I will be able to practice in any Australian state I desired. If you want to get admitted directly to other territory of Austrlia, you can do so. All Admission process is more or less same.

please go to this site to know more details about it-

http://nijhoom.blogspot.com/2011/08/practicing-in-australia-as-barrister.html