We would like to specify different question groups for different ticket types within the same event.
We have discounted ticket types for members of a particular professional association, and would like to set a required question for those ticket types only, confirming that they are association members.
It’s still not a feature at this time. The other topic you linked to has a few suggested workarounds:
The only way I can think to work around that currently is to include all of the questions within a sponsor question group that you can request from the primary registrant, setup a radio button question ‘Are you a sponsor’ and then based on the answer for that question hide/show the rest of the sponsor questions.
However for that you’ll need custom some custom development as its not something EE supports at this time.
Could you split out the sponsor tickets (and other types requiring additional [questions]) in another event(s)?