Motion Blur on Entire Roto Node Composite Edge

Greetings,

Is there any way to add motion blur for the entire composite edge of a roto node with a bunch of overlapping shapes?

My Scenario:
I have a very messy hair roto where it was too difficult for me to try and keep all of the single hair roto shapes always following the same single hair, because they would get lost in the shadows or highlights during the actor’s movements. I was able to make a cover everything I need with all the roto shapes, but I’m concerned that if any single hair roto shape has some extremely drastic movement from one frame to the next since, at times, I ended just using whatever shape was closest to cover random areas I needed to include, I’ll end up with some crazy looking motion blurs if I were to turn on motion blurs for the individual hair shapes.

Thanks for any help!

Unfortunately, no.