A mod created by SHUSHU restricts sims to their home world, including lots, the downside is that a lot of townies may be generated to fill walkby/employee/service roles around the world. But thanks to this mod I could say goodbye to (as I like to call) "Nancy Landgraabs" jogging around the world. There are a few exceptions to sims not staying in their resident worlds though. Like for festivals and stuff.
Kuttoe has so kindly updated this mod to make it compatible with the recent patch. If you're still interested/open to mods check it out here: https://www.patreon.com/posts/54534808
