Filter records based on a field NOT including the logged-in user

I am trying to design a project where users (students) enter their assays, and their peers would be able to rate these assays.

When looking at available assays to rate, I want students to only see those submitted by their peers and not their own.

Trying to filter this table of available assays, I am able to filter saying (Author is the logged-in student). However, I am not able to do what I desire, which is the opposite (Author is not the logged-in student). Is their a way to implement that, and in the meantime, is their a way to go around it?