Reflection on Concurrency
The closest I can think of is the MetaKlaim language. Klaim is a process calculus with asynchronous communication via tuple spaces. MetaKlaim is an extension of Klaim that integrates the meta-programming features of MetaML, namely multi-stage programming with types. (You may be more familiar with the syntax of MetaOCaml)

I am not an expert in any of these fields, so I don't really know if multi-stage programming fit in this definition of reflection. (I know this does not capture all aspects of reflection anyway so that's at most a partial answer).