Global User Mapping

I searched answers and the FE project first, and didn't see this asked. We have Fisheye indexing about 90 of our git repos and while we have near-perfect committer naming standards, there's at least a few users that need author mapping to their login name. Unfortunately, it's on a per-repo basis. Can you add global author mapping as an option? Today we have 90 repos, but I expect us to top out at about 300 repos, and telling users they have to make 300 entries to cover everything is more an onerous, it's impossible.