I've poked around and know it's possible, but it's not particularly easy. We'll have to use a service like
Voobly to do it.
I figured it would be more than just joining each other through stream. I remember last time I looked into it I found that it www a bit of a pain to set up. I was hoping I could just sign into stream, send you an invite, and play. Obviously, I don't know **** about PC gaming since the last time I played a PC game against someone was in 7th grade computer class playing doom when the teacher was gone.