This would depend on the model on which you are working, but the field to reference in such cases would be the " user_id". Please check if the user_id field exists in the model before creating the filter for the model.

As an example let's take the CRM app and create a filter that will display the opportunities that belong to the logged in user: 

So the filter will be created as follows: 

[("user_id", "=", uid)]

Where user_id is the Salesperson field on the opportunity and "uid" refers to the id of the logged in user. 

This filter will only show opportunities that belong to the logged-in salesperson. 

Similarly, if you have a user_id field in other models, we can create a similar filter referencing it.