I use Lightroom, and am a fan but it is primarily a database/cataloguing tool. As Greenbunion says it cant be selective - that's where Photoshop comec in - CS2 in may case.
Now I don't know how flexible NX is, and whether is has the capability to make selections based on channel information, selectively blur (to soften skin tones) & sharpen (to empahsise eyes etc) which I use a lot in post processing my portraits...so for example would you have been able to get from this
Vic_02060367-Edit copy.jpg
the RAW file for my shot of Victoria in this months comp with exposure adjustments etc...
to the end result that I
posted in my gallery Vic.jpg