How to set a field to a custom default value

Is there way to set a short text field to a custom default value? For example if I have a page for employees to enter their hours, they have to select their name from a dropdown in the name field due to a Connection. However I don't want an employee seeing the other employees' names so is there a way to not include this name field in the page and to automatically set it to the logged in user name?

Cool thanks

Just exclude that field from the form and update it through a record rule after every submission setting that value to the logged in user!

Here a guide: