Filter data by a field NOT containing the logged-in user

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).

It would solve so many issues for me, hope knack people puts this on high priority