If you validly apply for a visa inside Australia and your tourist visa runs out, you will go automatically onto a Bridging Visa A which has no travel rights. If you need to travel overseas, you may apply for a Bridging Visa B which will allow you to travel and return if you have an acceptable reason to do so.
http://www.downundervisa.com.au/2017/06/a-bridging-visa-b-allows-a-visa-applicant-to-travel/
Jeff Harvie is the Registered Migration Agent with Down Under Visa, the biggest, busiest and best Migration Agency practice in Manila, who specialise in partner visas (fiancee visas and spouse visas), tourist visas and family visas for Australian Filipina couples wanting to migrate to Australia from the Philippines.
The Down Under Visa - Visa Q & A Group is a Facebook group where you can join and ask about Australia visas from Philippines and get advice from a qualified expert.
Q&A Group: https://www.facebook.com/groups/1197294517014537/
Down Under Visa website http://www.downundervisa.com.au
Free visa assessment form http://www.downundervisa.com.au/visa-assessment/
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We apply for visa applications electronically through the Australian Embassy in Manila or DIBP in Australia. You and your lady from the Philippines are in very safe hands with Jeff Harvie and the team.