Denied Access Hook Based on Custom Field

[HBDynamic]

Hello!

I have a custom field we created for clients called "Sales Rep". We would like to know if it's possible to write a hook that when trying to view a client profile or tickets the system would check to see if the "Admin Role" is "Full Administrator" or "Development Dept (Full Admin)" or the admin name is what is in the "Sales Rep" field they would have access if not, it would deny access.

Thank you for your time.