We are looking to secure our AWS environment. How do we use hybrid and conditional policies to handle user access and permissions?

We ask the same underlying question in different ways.

• We are looking to secure our AWS environment. How do we use hybrid and conditional policies to handle user access and permissions?
• How can I configure hybrid and conditional policies to control who has access to our AWS infrastructure?
• I need to manage AWS permissions using conditional and hybrid policies. What is the best way to set up access control for our users?