This is not possible. and we also have no plans to introduce it in MONyog. Maybe you could have a look at another Monitoring tool of ours: Sealion: https://sealion.com/.
MONyog is intended for monitoring MySQL (with a few additional monitors for the underlying OS, if it is Linux). We have no plans to expand MONyog into a tool for OS monitoring, file system monitoring etc. With Sealion you can monitor anything based on a single-line command. This is the orignal blog announcing Sealion: http://blog.sealion.com/post/62987598857/why-did-we-create-sealion