Looking For Plugin - Connect admins to specific customers only.

I'm working on a site in which there are specific admins/dealers who need to be connected to certain customers, such that the customers, orders and reports sections will only show the customers that that admin is authorized for/connected to.
I have been looking for plugins that could either do that, or something close enough, without success. Does anyone know of such a thing, or would it be fairly simple to write? (I know a decent amount of php, but I'm not that familiar with the internal workings of zen cart, if I saw something similar enough I might be able to translate it to what I need.)

General Info:
Zen Cart 1.50
Fresh Install
upload via FTP and run zc_install
I've installed the "Sales Report" plugin and I'm considering the Super Orders plugin, but haven't installed it yet, there are some cosmetic alterations and I've customized the tpl_checkout_success_default.php to do certain things after a successful order.