I know I'm a little late to the game here, but..
Basically what LanInfoBox did was read what citizenship players input into the field (thanks to the citizenship-switch), then it would go ahead and add the icon / change the infobox's colors to fit the grand company's color scheme. It had a lot of similarities with Infobox-character.
Anyhow! Yes, LanInfoBox did call on citizenship-switch for a time until today (I've had many requests from people who wanted to change the color scheme to something that fit their profiles better, and because we don't technically have all the other regions, so it's since been removed and replaced with color options for tables).
I really liked its functionality so if I should decide to fiddle around with another template for an infobox I'll see if I can include it somehow.