We're looking at implementing JIRA for internal and external users.
However, we want to limit users field choices according to the customer to which they belong. In other words, if a customer uses projects x and y, we don't want users associated with that customer to be able to enter issues or even see issues for project z.
We also note that JIRA doesn't appear to have the concept of a customer to which multiple users may be attached. It would therefore be difficult to generate data pertaining to a particular customer or associate users with a customer.
This seems to be a major shortcoming. How do other organisations deal with this in JIRA?
Is anyone aware of any plug-ins we could investigate?