Adding options in page creation

Hello, i am currently working on a project wich uses wordpress. It’s my first time using wordpress and so far it went smooth.
The website is creating pages and they are showing the way i want. But, like most people on these forums i am stuck at the moment, and i have no idea how to get this fixed:

I am creating a website for a physiotherapist. On the pages that i create, with wordpress, i am writing about different ways to fixed people’s pains. Some page examples;
“1 Physiotherpy,
2 Manuel-therapy,
3 acupuncture”.

I want the above pages to show clients, wich person that works at the office can do one of those therapy’s. This is something that is different on each page.

My client who will admin this site needs some sort of checkboxes, while creating these pages, inwich he can “[x] person name” who’s abble to do that therapy…

Can someone tell me how i can do this?