Odoo v8: How to limit user access to contacts
<p>I'm using Odoo v8 and need a means to prevent certain users (either (preferably) in a sales team or in a user group) from accessing certain contacts (assigned to a different sales team) or the contacts at all.</p>

<p>I tried to achieve this via <code>Record rules</code> but don't seem to get this to work.</p>