There seem to be more general jewellery making courses than those strictly about silversmith work. However, we did find the RMIT Gold and Silversmithing Advanced Studio 3A1 program, as well as the RMIT Bachelor of Arts (Gold and Silversmithing) course. The RMIT (Royal Melbourne Institute of Technology) is based in Melbourne, Victoria. They also offer a Jewellery Casting for Small Objects course.
For more generalised jewellery making courses, the Gordon Institute of TAFE in and around Geelong, Victoria has a Jewellery Making - Advanced course, as well as Jewellery Making Introduction and Jewellery Making – Intermediate classes.
The Charles Sturt University, which has campuses all around New South Wales, has a Single Subject Study: Jewellery components course, as well as a Bachelor of Arts (Jewellery) program. The Monash University in Melbourne also has a Master of Fine Art (Research) (Metals and Jewellery) course.
Take into consideration your location around Australia and the level of study you would like to undertake. If you have any specific queries relating to the courses above, please fill out the green Contact Form on its associated web page and the institution will get back to you as soon as possible.