1. I'm not actually DHCP at work - since the leases were short enough to make uploading a pain (start JEmplode, wait for it to not find the player, get player address from About screen, type into JEmplode's dialog), I requested a fixed IP address (actually, I took it from a former machine of mine).

2. Yes, the address assigned at work is unlikely to clash at home - and my housemates are probably more accommodating than my colleagues in getting it right!

Anyway, @LOOPBACK/@NOLOOPBACK solves my wish much more effectively.