In the same store, can magento have several users loading products but one General Manager aproving the product before it is visible in the store?
If you are still looking for a solution, we have an extension that allows yu to do that.
Please take a look at the short video demo.
It's also available on Magento Connect - www.magentocommerce.com/magento-connect/advanced-permissions-3906.html
Aitoc is a group of distinguished web developers that have been building for Magento since 2009.
See our extensions for Magento 2.