Before answering your question, I did some searching, and found no reference to someone using MeshCAM with Marlin. On the other hand, it is possible that the output of one of the MeshCAM post processors is generic enough that it will work with Marlin. I found this to be true for Easel.
If you have MeshCAM, consider generating some g-code and attaching it to a post. We can take a look and give you a good idea about using it with Marlin. According to this page, output from the Mach3 and Shapeoko post processors are the most generic and therefore have the best chance of working.
Edit: Just stumbled on this six-year-old post by Ryan. He had it working on what I assume was Marlin, which reinforces the .idea that one of the post processors is generic enough to use with Marlin.
Edit2: Just found another post of a MeshCAM user. He did his mods to the model in MeshCAM and then exported the model to EstlCAM to generate the g-code.