Sort on Option label of Choice control

We would like to enable sorting on the Choice (single or multiple) control Option label.

We are frequently populating the Choice options with external data where we are unable to sort on the column we want.

For example, we have choice controls where the external data is from a Person column in a SharePoint list. We want to be able to sort the list by Person (Display Name) but unfortunately Person (ID) is the only Person data that is available in the external data variable's sort. Sorting on Person (ID) is not helpful. However, since we can assign the Option label to the Person (Display Name), we would like to sort by that.