Hiding posts from specific subscribers

Hi,

I have a hidden wordpress blog, that updates my customers on new features and functions on certain software we provide to them.

My problem is that I want to add a new post to the blog, but make it so it does not appear to 1 or 2 of my subscribers. So when they login to the site, the post does not appear on the site. Yet for all other subscribers, they get to view it as normal.

Does anyone know if this is possible or is there a plugin to do this. I’ve tried looking, but so far in vain.

Thanks for your help

Nigel