[ROM] CyanogenMod 10.1 Nightlies (4.2.1)

No. Simple answer. Its stock AOSP. If Google put MultiWindow in their source then yes, CyanogenMod will get it. For not you can use either stock Samsung based ROMS for MultiWindow or MiniTAB / Moon ROM for floating MultiWindow

I'm still a NOOB to this so pardon if this question comes off as such. What are some recommended Samsung based ROMS? And would I have to unroot my device to use them? I'm currently running the CM 10.1 for Tmobile Note 2. What would I have to do to run a Samsung based ROM?
 
Our Apps
Get our official app!
The best way to access XDA on your phone
Nav Gestures
Add swipe gestures to any Android
One Handed Mode
Eases uses one hand with your phone