There is, sort of. You can create a list of people, and then other people can follow that list as a group. If people are added to the list later, you'll end up following them as well.
So, you could create a global LW list and various local LW lists, if you wanted.
Looks like you can't include yourself in a list.
List of members of Less Wrong who are on Twitter:
Twitter accounts by people who aren't really "LWers" but recommended for LWers anyway:
If I missed anyone in either category, let me know. I'll keep this updated.
Last update: May 18, 2015.