Filter Data on Custom Link Field


Hello, please, can you help me with one small requeriment.
In my Customer Form, i created a child DocType as table, and I need to filter this “Contact” Link field.
First I created a custom Link field and set “Contact” as options.
But i need to filter ONLY the contacts related to that customer. Its that possible?

There in the image, is getting all the contacts available, but i need to filter with only that specific clients. Is that possible in the “options” field or I have to write a client script for that?

Thank you!