I believe the answer is "no" (which is crazy considering that parametrics is in the name of the company), but would love to be proven wrong.
I'm working on a spacecraft orbit visualization study, where time advances one step with each regeneration. Spacecraft moves around the earth, solar arrays track the sun. If I ever wanted to create a fully rendered animation of this, sure would be slick if I could lock a distant light source to the position of a CSYS, or control it via relations. I've been poking around, and this doesn't seem possible.
EDIT: also add to my wishlist the ability to parametrically rotate the "room". I made a room to represent the background stars, and this ought to complete one revolution a day, or a year, depending on what frame of reference I'm using...
And I'd like settings to have only ambient light effect the room; no other lights, and no shadows or reflections. I'm seeing the earth mirrored off the background stars, and bright spots where the lights hit; LOL.
EDIT2: I suppose what might work is:
Create a point where I want the light to be
Analyze the position of that point to create parameters.
Somehow, programmatically compose a *.dlg file (plaintext) that specifies all the lights, with one of them placed in the analyzed position
Import that *.dlg file with a mapkey.