And dragging this back to recruitment.....
Suffice to say, if recruited you can expect to be based at any of the longhaul aircraft bases, Perth, Melbourne, Sydney or Brisbane on most likely the A330 or 787 (unless you win the lottery and get a 380 spot).
Regardless of where you choose to live you will be expected to be at your base ready to operate as required under the award. As an S/O and it's a flying duty, that usually means ready to do a walkaround, participate as required pre-flight and be sufficiently rested to jump into a front seat at around 20,000ft on climb for up to 6 or 7 hours - assuming it's a longer sector. Most often though, you'll get the first break and do the latter 6 or 7 hours before top of descent (on 3-pilot sectors). As IsDon says, how you make that work is up to you. Most are making it work, but it only takes a few who wont, to change the current documented 'Commuting Guidelines' into 'Commuting Rules'.
If you don't feel that's for you, you think you can manipulate the system to your advantage or you have other interests that are more important than being fit for duty as required, withdraw your application now as you may still get a gig but your colleagues will soon tire of your attitude.
If you have enough enthusiasm to tackle that, then come on in, the water's great!!
Spoken as a commuter for 29 years.