Again, I'm sure that there is an easy resolution to this and I know I haven't read every page of the administrators guide, or every blog post, but this one is really getting to me.

Just say 2 development teams in the same company each have their own site, tracking issues for their own product.  The rules for the problem:

• They would like to record the client who reported the issue against the issue.
• We all work in the same company, and therefore we all have the same clients.  Each client may have a product from either team, or a products for both teams.
• It is not apropriate for these issues lists to be in one site, because different partners work with different teams on different products.  These need to be kept seperate for reasons of commercial confidentality.
• It must be scalable so that more teams can be brought online with minimal effort.
• Custom development must be kept to a minimum.
  

I want to maintain one client list and one client list only that has views into each teams site.  I can't seem to make this work for me.