BB Code hiding text and showing it to only certain groups?


Well-known member
I wonder if something like this exists?

This is what I need:

I wonder if I would be able to do the same with XenForo? I want to hold a similar contest, where I want the participants reply in the thread and hide their answers from each other by putting them between special bb codes. Only certain user groups (staff usually) are able to see these posts, actually those answers.

Does something like this exists for XenForo?