(I've not installed the Custom Admin Bar plugin yet because I don't think it has this capability.)
I am using S2 Members Pro for payment, membership, etc. I have the traditional roles Editor through Admin. S2 Members also provides at least four additional roles, Level1, Level2, Level3, Level4. Currently, I use a plugin to suppress the Admin Bar for these paying customer roles. But I am considering whether I could show the admin bar if I could control what a Level1 through 4 user can see.
So, can your Custom Admin Bar Plugin display different information by role? Example: For paying members I would show one set of links, for Editor through Admin I would show a different set of links.