How to add virtual ssh user on CentOS 6

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Hello guys, i want to know how to add virtual ssh user to CentOS with shell.

I mean that, i want to add user, but when i connect with this user from putty, it will be like a root user, but in owned folder on this user.

This user will have all permissions in the owned folder and that user will cannot access in the above directories.

I mean that: If owned folder is /home/USER_1/

This user will have not access to /home folder or something under it..

I want to be like in separate environment.

I hope to understand me what i want guys, and to help me.