Sharepoint - Different Access Rights for Different Folder on the Same Document Library

Hi All,

I am having a problem on setting access rights on Sharepoint 2010. The scenario is as below:

Document Library ABC-- can be accessed by all users.

- Folder A1-- folder can only be accessed by user A, can't add new folder / document under this hierarchy.

-- Subfolder A1.1-- subfolder can be accessed by user A and they can add / delete document.

- Folder B1-- folder can only be accessed by user B, can't add new folder / document under this hierarchy.

-- Subfolder B1.1-- subfolder can be accessed by user B and they can add / delete document.

Is there any workaround for this? Or maybe custom code as well?

Thanks,

Felicia