Adding more, the following can be a broad and scalable outline from the user experience perspective.

1. Each user can open a 'perspective' of his choice, from a number of inbuilt and custom 'perspectives'.

2. Each perspective consists a combination of filters.

3. The user should be able to add or remove filters, on each perspective

4. The user should be able to set or adjust the parameters for each filter.

5. When a user opens a perspective, he will see only the posts, that can get through the filters included in that perspective.

If we choose a name for the project we can start a project on GitHub and move the discussion in there. (Guessing you meant an open-source project)