I was curious if wall of force can block out auras, like the nightwalker's. The nightwalker deals damage at the start of their turn, can this effect people in the wall of force.

The wall blocks everything physical. I’d say that auras can go through it. 

this gets into a weird territory, because does that mean magic can pass through? If so could viscous mockery pass through?

Compare the wording of Wall of Force and Tiny Hut. Tiny Hut specifies that it blocks all magical effects. Wall of Force doesn’t.