[Tig] grading split-screens?

[Owen Williams]

Hi,

Being new to the list, I'll briefly introduce myself before I ask my
newbie question.  I'm an online editor and colorist in the Boston area,
and I've done all my major work on a Symphony Nitris, although I've
played around with Apple Color a bit.  (imdb page:
http://imdb.com/name/nm1741110/).  I'm interested in expanding my color
grading skills, particularly by learning some grading systems other than
Avid.  

I was wondering what the workflow is for grading split-screens or cheesy
wipes (3d spins, pushes, down-the-drain warps, etc) in applications that
don't support more than one track of video.  In Avid I often dive into a
container so I can grade a shot that is part of a split-screen or
wipe.  

In applications that only support one layer of video (like Color for
instance) how are these shots normally treated?  The only two methods I
can think of are secondaries with mattes, in which I'd have to match
whatever movement the splitscreen has; or I could have the offline
editor split up the shots beforehand, I grade them, send them back, and
then the splitscreen is assembled and sent back to me.  The first method
could be timeconsuming to manually match the move, and the second takes
a lot of round trips.

Do these issues exist on higher-end machines like da vinci or lustre, or
can they deal with multi-layered effects like this?

thanks,
Owen Williams