Only allow user to access records based on specified field value.

Only allow user to access records based on specified field value.

Hello,

I am using Hariharan's CRM.

Each store has a unique Zoho login.
In the New User form I have a field named STORE.
(There may be 2 or 3 users per store)
Also every record in a form called LEADS there is a field called STORE.

I need to ensure that when a store logs in. They can only view their own records and not the records from other stores.

Can anyone please help?