I have thoughts on it.
My first thought is that there is no such thing as "cast" conditioning. It is "cask" conditioning.
My second thought is why would you filter after cask conditioning when the whole point of cask conditioning is creating an unfiltered, real ale. If, for some reason, you desire crystal clear beer perhaps you should not drink cask conditioned ale . . . or choose a yeast strain with a high flocculation rate.
I don't mean to sound rude, but I don't think you "get" cask conditioned ale.