Display a custom field only for a category?

Hi,

I'm trying to duplicate for a client an event form to create two events types.
The actual event sample we are using to create the future events has a radio custom field with some options.
The events are actually in a "cat1" category. I created a "cat2" category for the new event type.
We would like to separate some of the options and offer two types of event, each with its own options, but the custom field can't be applied to only one category.

How could I use one radio custom field for the "cat1" and another one for the "cat2"?

Thank for your advice.
Best regards,
Robert

PS: same question for the other custom fields types.

In the custom fieds settings, I don't find a choice for category, only for field assignmenr, as it's said in the documentation: eventbookingdoc.joomservices.com/basic-s...om-fields-assignment