Unfortunately, no, we cannot show posts from protected accounts on your wall. Since the user has chosen to not allow everyone to see their posts, we must respect their privacy and not show their posts on the wall.
If the protected account is yours, or you have control over the account, you may be able to unprotect the account for the duration of your event and then we will include them on the wall. After the event is over, you can then protect it again. Keep in mind that for the duration of the event, anyone would be able to see any of your previous posts, though.