Hey there!
If you hover your mouse over condition that’s on enemy, it’ll show you who casted it.
I think that it’s great to see who is source of condition. In world bosses though, when there are dozens, even over hundred, people attacking them simultaneously it can be worthless usage of processing power.
As I was cheking it out against The Frozen Maw it flashed very fast player names on conditions.
Let’s say there are all 13 conditions on World Boss ( or Legendary ), each flashing 10 names per second on average, it would mean over 100 worthless actions per second to processor. Of course processors are capable of huge amounts of actions per second, but I think trying to do something about this would be a step forward in making GW2 well optimized game.
My numbers are just estimate, might be well less/more serious