The owner of a Wave account is the person whose email was used to sign up for Wave. This does not necessarily have to be the owner of the business, though in most cases it will be.
The Wave account owner can invite others to access the account as Admins, Editors, Viewers, or Payroll Managers, who can view and work with information in the Wave account.
The account owner decides who to invite as a user, and what level of access they're granted.
The owner can give access to only one business or personal account at a time. If you are the owner and you want a user to access more than one of your businesses, you will need to send separate invites for each one.