Yes, but I think I should explain the system behind it.
jUsers get extended by the vmuser table.
Additionally to that missing data gets completed:
no shoppergroup assigned, wenn anonymous jUser =>anonymous shoppergroup, else registered.
no perm assigned, =>shopper, except an admin or superadmin logs in, then admin
So a joomla user can login,.. is automatically a recognised shopper and just need to add his address.