Originally Posted by
nonesuch flyer
Insufficient information!
If inbound flight is international, and no outbound domestic flight on QF that day the answer is certainly no. You would not even get into the domestic terminal.
If you have an outbound domestic flight on QF that day and you are OW-Emerald (there is no such thing as AA-Emerald) then you would have access to QF domestic lounges (including business lounge if available).
If you have an outbound international flight on QF or a OW airline (assuming such exist) then I suspect you still would not be able to access the domestic terminal.
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The parts struck out and in red are incorrect.
In Australia, people do not need to be flying to pass through security to access airside at Domestic terminals.