Administrator can add content for other users? I have some users in admin/people.
Administrator can have the permission to view/edit/delete contents created by these users.
Is there any possibility: Administrator can add content for a user from administrator back end?

Or is this out of scope?
Thanks
The author of content is driven by a field in the Authoring Information Tab on the content's edit screen. You can set this field to be any user, and that user will be considered the Owner of the content for permissions purposes. By default this field gets populated with the current user.