I think your above post is follow-up on this question, therefore we will answer your additional question here.
In order to make sure the select-options are not linked to each other, you should make sure the custom-drop is linked to the current line (i.e. director).
Heeft {{ director.name }} een zorgvolmacht? {% input director.custom.check_zorgvolmacht as:select options:“Ja|Nee” %}
Kind regards,
Robin