Salesperson Own Contacts Odoo Apps

Salesperson Own Contacts-Customer Odoo apps helps to manage sales person's own contacts and customers only, it's only visible and display contact belongs to that particular sales person. When users have 'Sales/Own Documents only' group access then those users can only see their own contacts menu under CRM which only shows contacts belonging to user login as salesperson of contacts plus those contacts which doesn't have any salesperson. When users have 'Sales/All Documents' group access then those users can see all contacts data.