If you have ViewNX2 or Capture NX-D loaded onto your PC, you can use the Picture Control editor.
It's a separate (but built in) program that allows you to adjust the look of the picture control look, but it only works on the NEF file.
But what you can do is create a look in your Picture Control(eg. if the landscape PC is too vivid, you can tone down the contrast, colour, etc a bit) using either the sliders in the editor, or better still use the tone curve tool(which is more incremental and hence more accurate in fine tone detail).
Once you have that look you're after, you then have an option in there to save that Picture Control look you've just created and load it into the camera as a user defined PC.
If you edit the raw file in any software, in the exif will be the description of the software used to edit the raw file.
So if you used Nikon's software or Ps/ACR/Lr .. it will say this in the exif.
if you shoot straight out of camera tho, the description of the software used to make/edit the image will be the model of camera you used, and I think with the firmware loaded at the time.
eg. if you used a D7200 with firmware v1.01, then in the software field in the exif it will say something like Nikon D7200v1.01 or something like that.
This can be important if they want you to shoot jpg straight out of camera!
Also, if you shoot raw in camera and don't like some small aspect of the picture control used .. AND want it to be a jpg straight out of camera, with the raw file still loaded in the camera after the shot, scroll down in the menu to the edit feature.. you can adust some of the PC controls in there and then save the image as a jpg.
The software description will still use the camera model to describe the software used to edit the image(ie. straight out of camera!)