How to give clients access to labels

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I just installed eSupport and am very imressed. But it has so many features it is difficult to dermine the best way to do some things. I have two clients who send me several emaisl a day each asking me to do something. Some tasks would be included in their level of suppor and some would not. So I want to be able to identify which tasks are free and which ones they have to pay for, how much they have to pay and they can approve or not.

I am thinking the best way may be to actually make them staff with very limited rights. When the tickets come in I can assign a label and a price. They can look at, for example all of the yellow lables which would require their approval. But I do not want them to see billing info, private notes, etc. Am I making this too difficult? Is there a better way to accomplish this?

Thanks in advance!

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Or maybe set up a department just for these clients? That way several employees can review and comment or authorize each task?