Hi, Thank you for the answer, but it's a bit to detailed for me (I'm an Odoo beginner)

Where should I put all this xml statements? I an addons directory there is a "contacts" directory, but I can't find there similar lines. Should I create a new file or a new addon?

What is security group? Is it a group like "User: Own Documents Only" or "Internal User"?

What is the "module"? (As I understand the "model" is a database name, and a filed in developer mode Record Rule)

Ok, I think I got a solution. I have to deactivate private record rule for internal users and assign user as it's own salesperson in contacts. Now it seems to work...

Hi,

By following these steps you can create a new rule for the partners.

1. Hope you have a module category for the module to add the security groups.

eg:

<record id="module_module_name" model="ir.module.category">
        <field name="name">Module Name</field>
        <field name="description">Access for Module Name</field>
        <field name="sequence">50</field>
 </record>

2. The next step is to create the security group. You can refer to the code below.

<record id="module_name_own_documents" model="res.groups">
        <field name="name">Own Timesheets Only</field>
        <field name="category_id" ref="your category id"/>
</record>

3. Next, add access rights for the newly created group in your security file.

eg: 

access_model_name_own_documents,access.model.name.own.documents,model_model_name,module_name_own_documents,1,1,1,0 

4. Add a field in your model for the user of the corresponding employee.

user_id = fields.Many2one('res.users', string='User',related='partner_id.user_id',help='The user of the partner')

5. And last, create the rule for viewing and creating own documents.

<record id="model_name_rule_user" model="ir.rule">
    <field name="name">Model Name: Own Records</field>
    <field name="model_id" ref="model_model_name"/>
    <field name="domain_force">[('user_id', '=', user.id)]</field>
    <field name="groups" eval="[(4, ref('module_name.user_group'))]"/>
</record>

Regards