No. If you're flying on the QF9 you'll be on the same jet all the way through and your bags will be checked all the way through.
If you're coming from somewhere else (say ADL or SYD) you'll have a 200m walk (or less) between the T4 domestic gates to the T3 international departure area. You'll have to go through customs but with only a couple of hundred people I don't reckon that'll be an issue and youlll probably already be checked in.
Like occurs in any other port in Australia now, your bags can be checked all the way through from your domestic flight.
Returning may be a bit different if you're transiting and going to ADL. You'll need to clear customs in PER before checking in for the domestic flight. I suspect that will be made pretty seamless though and again, it's not like there's going to be heaps of people. If you're going to MEL though you'll clear customs in MEL.
Rechecking baggage on the return leg will be a hassle for any domestic connection...