You can create a unique questionnaire for each group of respondents.
Go to the project page and click add session and choose between ideation session and assessment session.
Click the Groups tab.
Activate the desired groups of respondents for each session. Each session must have at least one activated respondent group.
You can add new background questions or add new groups if needed.
Specify the contents of the questionnaires in the other tabs of the project (items, criteria, open questions).
When you send questionnaire invitations, be sure to select the session you want them to respond to in the Invitations tab.