Restrict a Sim to its lot?

[IronBeard]

I wonder, does anyone know of a way to prevent a Sim from appearing on lots other than the one they reside in?

Having recently discovered Bloom's Monk outfits, I'm keen to build a monastery of isolationist chocolatiers. I've also built a gaol with some custom bar fencing and gates I downloaded (there are some truly 'orrible Sims in my hood!), but of course inmates can be found wandering into other lots willy-nilly.
The only way I've found to control this is to use a visitor controller to ban Sims from lots when they appear on them, but it's not ideal to ban them from lots that they might otherwise visit after their release from incarceration!

I know, daft isn't it! Still, thanks in advance for any cool suggestions!

[Engram]

Since you already have the visitor controller, you might be interested in the electronic prisoner tag found here: http://www.drealm.info/simlogical/sl/Sims2Pages/Sims2_Prison.htm

Simply put it into the monk's inventory then set VC to ban everyone with the tag. Once the prisoner/monk is ready for release, just take out the tag and they're free to visit other lots.

[IronBeard]

Oh wow! This is great, Engram... a total DIY prison package. Finding gems like this is a bit like Christmas. Thanks a bunch, I really appreciate you steering me towards it.