multiple cascade select custom field

[Henk Smets]

I would like to add a custom field to let people add customer names when reporting an issue.

Ideally you can select the sector first to limit the number of customers and then choose the names of the customers in that sector.

I would like to dynamically load the content of the select fields form an api and to add a customer code from the same api (without autentication).

I don't find a custom field with an cascading select option. Apparently adding javascript in al text field is no longer allowed for security reasons. There is no plugin for the cloud version.

Are there other options?