I do not believe you can do that, because the proc would have the same ID, but I suppose it is possible, I am not a WA master. I know you can make one icon show that you have multiple procs, but not separate ones, I believe.
Hmm, tried autoclone dynamic group with trigger combatlog_event aura_applied, self only and custom hide timer?
MSBT will alert you when a certain set of circumstances is met, in this case two applications. Should you desire, it will alert you with a custom message, placed where you want on the screen and/or an .mp3 or .ogg file of your choosing.