Relate tables by words in fields?

[Cassetti]

Basically, I'm rebuilding the database for our entire company. And we have several offices located in other parts of the world.

We are building IWP databases for these offices. But we only want them to see the items in our live inventory that we want them to see.

Currently we have a field for example called "EMEA" in the inventory database for each record. This is set to "yes" - we have a variable on the other database that is set to "yes"

That works, but as our office grows, this will be a horrible option if you add 5 or 6 more branches (we intend to add at least 1 more branch in the next year)

Is there a way to have a field with check-boxes for each branch. And set up the relationship to match words within a field?

I hope i'm making sense. I'm not a database guy, i have time, and skills in scripting and UI's, so i got the project. Lucky me :