Yes, that's him. In the "RPG Chat (German)" and "Chat (German)" sections of the forum many members used to act according to their chosen roles, but a lot of them have left, unfortunately. Buad is occasionally still around, though.
Some of the old forum RPGs can be found in the sections mentioned above, but finding them might require some digging. Buad was also active in the "On the Road Again" forum RPG, the most recent one that has seen any activity, but it's currently paused since quite a while.
