Sorry, this not working for me. 

I need do it by Record Rules. 

I want that users in a specific group, can view only their Sales Order. 

But if a put a record rule: OBJECT = SALES ORDER, DOMAIN = [('x_sorder_pm.user_id', '=',user.id)]
Then this user can´t write timesheets in all projects, only in that where the x_order_pm field = user.id

Create custom group in sale order, and go to sale_order view form,then give attrs = "{invisible:[field_name == 'something']}"

example :

<button class="oe_stat_button" type="object" attrs="{'invisible': ['|', ('sale_order_count', '=', 0), ('type', '=', 'lead')]}"

        ////////

</button>

Note : I give example for button,you try in menuitem.