Like TK-Master said in his case, majority of my examples are based in Dynamically Lit worlds. Though, I have worked with the subsurface shadowing in a static/dynamic environment before. The world is lit Static/Stationary while the light that will be casting the shadow onto the Privacy Screen in the scene was set to Movable.
Here’s is a shot from the scene:
Here’s a shot from the material (You don’t need the emissive node. I only use it to boost the brightness of the shadows):