I like the idea of the Country Flag icons that you show when focusing in on activity in the Graph, but like most of the (US at least) population, I only recognize about a dozen international flags.
Also, I don’t really know what the various icons represent under Host.
I’m sure that you are trying to keep your program lightweight, so I am not suggesting more drop down menus on top of the ones that you already show in Graph details, but maybe a simple “Key” screen that defines the various icons that you use under a Help tab?
For instance, I have no idea what Nigeria’s flag looks like, but I’m thinking (hoping) that legit apps like Mozilla aren’t bouncing my data thru there! Seeing a country (name) associated with the flag icon would be comforting. Seeing which countries MAY be suspicious with an asterisk next to them or something would be even more comforting/useful.