FME Server Roles and ESRI SDE Connection files

It would be really nice to be able to control access to ESRI SDE Connection files by FME Server roles, much like we can for named connections in FME Server. We have to embed authentication into the sde conneciton file itself (using the passwrod override in the fmw itself is not a solution, that has it's own set of issues), so access to these sde connection files needs to be controlled. I would imagine the architeture of FME server would make this a challenge, but it is worth exploring in our world of ever needing tighter security on things.