I would like to be able to setup a TFS Dashboard that dynamically updates based on a parameter (e.g. Customer) that I set on the Dashboard itself. I have a set of TFS Queries that I would like to link into the Dashboard that all use the parameter - and I'd like to pass the parameter from the Dashboard to the Queries. Is it possible?
No, it's not possible.
The dashboard doesn't support parameters, it can only be configured with the basic work item queries.