sharing a group (of contacts) in WLM?

Most of our employees use web access via their favorite browser -- though some would use Outlook or another client as well.

A question arose recently about how to get eMail 'distribution lists' to be shared under this hosted live.com service.

So far, we've figured out how to create a contact group and how to add members to it.

What we'd really want is a way for all our users to be able to send based on a 'common' (perhaps "public") file/whatever.

For example, 'managers' might contain (A,B,C)  and 'setters' might contain (C,D,E,F); and there may be other employees (G,H).   

And given this, we'd like to be able to accomplish (basically) two things:

   (1)  Only A, B, or C could modify some public version of a 'managers' contact-group; but anyone A-H could see it's contents and send a message to 'managers' (without having to re-download, re-load the list each time a message is being sent.)

   (2) Only C could modify some public version of a 'setters' contact-group; but, again A-H could see the contents and send a message to it...

It seems we should be able to do this somehow with a file in a shared section of a SkyDrive -- but we've not figured that out yet.

I've looked around a bit (Google) and can't seem to find current info about this type of feature for the latest (Jan 2014) WLM.

ADVthanksANCE,

michael grimes