Folders have rights, too

iMakeFolders lets you create folders with specified rights, groups and owners.
It was written for a school for restricting access to certain groups.

Pricing and availability.
iMakeFolders is donationware, which means it's free. However, if you like it, we would very much appreciate if you considered making a donation.
iMakeFolders can be downloaded here, it requires Mac OS X 10.3.9 or higher (Leopard compatible, Universal Binary).
Specify, create.
Set the rights, owner and group for the to-be-created folder, set a name and click on create.
Everything you need right at your mouse pointer.