Hi
no there is nothing like "limit colors to NTSC or PAL or whatever" but after you finished your comp you schould add Histogram operator and then limit white to about 90% ,. You can also add Broadcast safe colors operator and select NTSC and luminance to compensate your flashing whites, anyway it's just a matter of limiting maximum white to 90% or so . - so first add Histogram operator and reduce maximum white level and then add Broadcast safe colors for ensuring that other flashy colors like cyans and so are also reduced.
that's it
cheers