Hi Thomas,
I assume you're not using ProjectWise? This sounds exactly like something that is typically achieved through PW permissions/work states. That said, is it down to specific DGN files within the \models folder or the entire \models folder? I'd imagine the latter may be possible using a similar process that you're already following, but I've never come across a way that allows one to lock permissions at the file level. Not saying it can't be done, but if so, I'd also be curious how. :)
I assume you're not using ProjectWise? This sounds exactly like something that is typically achieved through PW permissions/work states. That said, is it down to specific DGN files within the \models folder or the entire \models folder? I'd imagine the latter may be possible using a similar process that you're already following, but I've never come across a way that allows one to lock permissions at the file level. Not saying it can't be done, but if so, I'd also be curious how. :)