Yes, it can be done.  

Poser files are text files and are easy to edit.   If a channel has key values, those values can be controlled by another dial by inserting the proper code lines.

Poser itself has a "Teaching" function that does this, but since I am used to getting at the "guts" of a file directly, I have never bothered to learn the necessary fine points wen going at it this way.

D3D Poser File Editor may have a function to assist, but I have no hands on experience using it to do what you are after.

I find it easier to just hack the controls in using a text editor and the straight Paste function in PFE.

The master dial - I would just generate using  an existing master  to provide the base structure.