I am using Odoo 13, Would like to restrict users that have been assigned e.g. for my case project in settings to only see the data for the project assigned to them in a custom app

For Example in setting a user is assigned two projects in a Many2many field

The Project is a separate custom app

On a particular Tree view  of another  app,  the user should see only the project assigned to them in settings app

The record rules I am trying to do doesn't reflect projects in settings. Its referencing the user _id field in the Project Custom App

    Fleet Vehicle User
    
    
    
    
    
    
    [('project.user_id','=',user.id)]

I'm new to odoo dev.