Hi,
That kind of feature is provided by the add-on HikaMarket front-edition.
www.hikashop.com/extensions/hikamarket-front-end.html
It allows you to manage the store from the front-end ;: and you can configure very deeply the accesses for each user.
So you can let one user just have access to the order and customers ; but not to the product or categories (for example).
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.