File Sharing and restricting between multiple users on multiple PC's

Hi, My first post here. My question is about how I can set permissions for the users on a network of 3 x computers that all have Windows 7 Home edition to share folders. Here’s what I’ve got. Three computers, each have 2 x users. The 2 users are 1 x Manager (Admin rights) and 1 x employee (User rights). On one of the computers I have folders which I’d like to share (read / write) with...