As of my last knowledge update in September 2021, international students in Australia who complete a Master's degree in Urban Planning were eligible for a Temporary Graduate visa (subclass 485), which offers a stay-back period of either 2 or 3 years, depending on the level of study completed. The stay-back period allows graduates to work and gain experience in Australia after completing their studies. Please note that immigration policies can change, so it's crucial to verify the current regulations with the Australian Department of Home Affairs or consult your university's international student services for the most up-to-date information.