Filtering xUnit tests in a CI build with VS2013

Using the xUnit 2.0 VS runner I've set up multiple builds, including one CI build, for a project that implements unit testing. The only problem is, I'd like to filter those tests somehow based on the type of build that runs. I know there's no easy way to do it like in the xUnit console runner but I wanted to know if anyone had ideas for a good workaround. Currently the best option is to simply give up on that and split my unit tests into separate dlls, but that would require a lot of redundant testing code + maintenance. I believe I could also call the console runner as a command in an MSBuild .targets file, and filter on traits, but that would obscure the test data, right? Hopefully I'm missing an easier solution that's right in front of me.