The only way to can share a PutPlace account is to share your log in details. This often works for families backing up from a number of devices and machines (laptop, desktop, gaming machine, etc.) in your house. Having family-wide log in means that everyone in the family has access to all of your data.
Currently, PutPlace does not offer granular access control. For example, Mom and Dad can see everything, but children can only see certain content.
The solution is to buy two accounts-one for family data that everyone can access and update, and another for your own, private records and files.