So do you want to do excentric turning?
Turning is XZ,
And for excentric turning you have to control X by some function or by generation each point of shape.
In NX turning it is impossible I think.
First you have to know NC code you need.What your amchine need for such case.
If your machine wants XYZ C - you can do it by some mill multiaxix operation with postprocessor for this kinematic.
Or maybe there exist some cycle, or some trailing axes with functions, ...
ALso there can be generated XYZ and C a 5axis oepration and in spindle is loaded lathe tool.
But in turning in nx it generates just XZ. I think there is no automatic way.