Keeping One Friend's Comments Invisible to Another Friend

Is it possible to keep all posts, comments, photos--basically all contact--from one friend unseen by another friend so that in effect, neither friend knows that the other is my friend? Either that, or they know that they're a friend, but all contact from them is invisible to the other? I know this is possible with photos, but what about comments?

Hello,

Unfortunately, I don't think that is 'all' possible - you could create friend lists via your [You must be registered and logged in to see this link.] to customize who can see what, but unfortunately I don't think you can completely prevent one from seeing the other via your profile (unless, of course, one of them blocked the other).