It's know as the 'doha' exception. The rules previously allowed connections in Doha for travel to Asia (from Europe etc), but this has now been extended to include Australia. Unless it's changed back in the last couple weeks or so.
Whilst making a change to an existing booking I enquired whether connecting through Doha was one or two awards as I had seen conflicting statements regarding this. I was informed that it was two awards so requested a dummy booking from PER to LHR. I was told the booking resulted in two awards on their system. This was about a month ago so I don't know whether it has changed since. However whilst the forum has reference to Doha being an exception I could not locate any post which had a one award booking with a Doha connection