So i have some questions in my form that I want to appears only to some specific Users or Groups, How can I do it with the Display Conditions feature
If you want to display specific questions in your form to only specific users then first of all you need to pull the username field in your form. You can do this by creating a hidden value and enter the /data/meta/username in the calculate condition.
After you have done this, use this hidden value in the display condition of the relevant questions and select only those users to whom you want to show the questions.
Hope this helps.