Unique ID widget: Ability to generate the unique ID based on a condition set on the form

I have a form that generates a sequential number each time there is an entry. Works great.

Can I have a field that generates ANOTHER sequential number (different field) BUT only if a certain radio button is selected.

Example - form entry 1 generates number 1

Form entry 2 generates number 1 and number 2 resulting in (1-2) for example because a radio button that was selected told the entry that it needed the second digit. 

I basically want to "pause" one of the numbering fields for each entry UNLESS a radio button (or similiar) is selected for the entry.

The unique ID widget generates the number for each submission. Unfortunately, we do not have any other widgets to achieve your requirement. Let me forward the thread to our backend team as a feature request for evaluation. Unfortunately, we cannot provide any ETA at this moment. However, if there is any news you'll be updated here on this thread. 

Thanks!