asterisk users - Jun 2008 - Can I use X-Lite from local and external ip (when I'm not at home) ?

Hi,

X-Lite demo version has only one SIP account possible. I'd like to set it up
in such manner that I could register with Asterisk being at home (local LAN, 
local ip) and at work (external ip).

Is this possible since X-Lite allows only one sip account settings ?

Thanks in advance,

regards,

Rob.