Okay, so as far as I can tell, this forum doesn't have this mechanism. However, I've seen some double posts just to quote many people around so if it's even feasibly to make or implement easily, I think it should.
On another forum I go to, there's this feature called "Multiquote." This feature allows you to click a little button on the top right of each post and instead of immediately going to post, prepares that post for a quote. You then proceed to select the other posts you want to quote and when you've got every post you want, you hit quote and a reply box appears with all of the posts you've selected in their respective quote tags, in the order that you selected them when Multiquoting. So basically it queues up a few posts for you and then slaps them into a reply.
I'd help with developing one myself, but I'm not as familiar with the inner working of forum code/databases as I'd like to be. Beyond that, I really can't focus on extraneous work because of my class schedule.