Glad to see you aboard Everhardt!! I'm equally encouraged that our tags running around GW2 are becoming recognizable and prominent
As for our policies on alts, we don't have any. We would strongly encourage you to represent LoE on all your characters, but with GW2's unique and dynamic representation system we A) can't honestly enforce mandatory representation and B) would be silly to take this element out of the game that makes it so community driven.
I myself am in several guilds, I spend most of my time in LoE, but for certain situations (namely WvW) I'll represent our WvW guild and run around CAMPing.
All in all, we'd love for you to spend your time in LoE, but we also encourage you to branch out into other Christian guilds and the SoR community.