Hi, I am a dog trainer and I would like to use Trello so that I can make notes, set tasks and give information to my clients. I have set up a board for one to one clients and was going to add a new note for each client but then when I add them to the board they can see everyone else’s notes too. I want to be able to add a member to a specific note only, is this possible or do I need to set up a board for every client?