Override the options of a specific field for a form

I would like to change the “where” from relationships fields in a form. So I can make differente forms, depending on the person who is logged in. So that in one form of the same pod, only these options are available and in an other form of the same pod other options are available for a specific field.
How do I do this?

And which options are there to change options of a form, on the website of pods I see this ones: type, label and default. Are there more options to change.

Warm greetings
Stijn