Using WHM for shell hosting (creating accounts, etc.). Want to limit BGs. HELP?

Hey. I use WHM to create accounts on my shell hosting packages. It's nice because it limits quota, BW, all that. Question, does BW limit suspend web or entire access? Entire access would be nice.. for me... lol. Anyways, I have created user groups with limited BG processess.... how can I configure WHM that when I add users, to be able to select from a drop down or add a package which links to a user group, so that user accounts will be created and have a BG limit?