Need three separate logon IDs for Norton Identity Safe (3 separate vaults)

My subscription to Norton Security with Backup (NSBU) is now installed on three desktops or laptops: for myself, my wife, and our daughter. I only recently installed it for wife and daughter. While I was installing NSBU on my wife’s desktop, I wasn’t able to set up her Norton Identify Safe Vault as a separate vault, having its separate login ID and password and a separate listing. We don’t want to see each other’s library of websites each with their IDs/passwords when each views our own ID Safe lists. Since we have ID Safe because of our single subscription to NSBU, does that mean we can only have a single, shared ID Safe list? Can we split apart Norton ID Safe from the single subscription to NSBU which I have?
Thanks.