not sure what you mean by "My Network". Let's say you have this layout on your file system:
you have shared departments and now you enabled ABE on that share. If i belong go active directory group IT , when i map a drive to \\cifsserver\departments ..the only folder that i should see is "it" (assuming my AD account has permissions to only that folder). If you did not have ABE enabled on share "departments", i would map the drive and i would see all 3 directories. I would probably get "access denied" if i would try to access marketing or hr but ABE enabled i should not even see them.