Copy / move files between two users of different domains

As a cPanel user, I would like the ability to move files between domains so that I can duplicate content between sites.

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I'd love to do this: to move files between two domains that I own, I need for example this:

[user1@ip-xx-xxx-xxx-xx Folder1]$ pwd

/home/user1/public_html/domain/Folder1

[user2@ip-xx-xxx-xxx-xx Folder2]$ pwd

/home/user2/public_html/domain/Folder2

[user2@ip-xx-xxx-xxx-xx Folder2]$ cp *.* /home/user1/public_html/domain/Folder1

and this is not possible...