What you probably mean is the legitimation for several airports, which are difficult to fly in, like Funchal/Madeira for example. But Douala certainly isn't, so special experience is required "only" due to the harsh weather out there on the west coast. And that, i assume, all pilots (captains) at KQ should have! Maybe i'm a bit too credulous?
Maybe you think about KQ differs between captains for "westbound routings" and "the rest", but i doubt they do, and i also doubt it would be necessary, as red/magenta on the WX tells everybody the same: don't fly into, end of it. So simple.