@SNIPPET Binding get values of parent field settings

I have a dropdown field inside a Repeater. This field should show the value of a settings field of the repeater as options.

I can do this with an @Snippet binding an run cbGetFieldContent inside this Snippet and format the output.

This works as long as i have this field only once on a resource. If i have this field twice or more on a site i only get the values of the first field or all values of all fields. Is there any way i can get only the values of the parent repeater settings?