How do I prevent other users on my invoicing system from seeing invoices generated by the admin user?

How do I prevent other users on my invoicing system from seeing invoices generated by the admin user?

I have just about recently started using Zoho invoice but I am really disappointed to note that all users have access to other invoice information/ payment / client details. Is there a way to restrict users from accessing admin generated customers/ invoices etc? If there is none, I will be forced to pay for 2 accounts instead of combining invoicing into a single account.