Custom properties for Tasks

It’d be super valuable to be able to show custom properties (or any property for that matter) on the Task view as a column AND be able to create filters on these properties.
Currently trying to do so with a custom value that ID’s contacts who have bad/wrong numbers that I’d like my team to skip over re-calling, and the inability to do so creates a situation where we are wasting a lot of time double calling numbers that we’ve previously ID’d as bad.