Does anyone know how I can solve this Xwindows problem out?

what i'm doing is connecting from my Windows PC to a Unix server. I would like my IP address to be passed to X automaticly so I can run XWindows. So far I'm doing the following.

finger $LOGNAME | grep from | awk '{print $9}'

this displays my IP address's that I have come from in the past
(I have DHCP) Not a static IP Address.

I would then get an output like this
(ip numbers have been changed for X's in this example)

XXX.XXX.58.22
XXX.XXX.67:0.0
XXX.XXX.64:0.0
XXX.XXX.64:0.0
XXX.XXX.64.215:0

My latest IP adderss is always at the bottom. How do I then extract this and output it to a file ?

Once I can do that I can automate the rest in a script:

MYIP=`finger $LOGNAME | grep from | awk '{print $9}' .........`

DISPLAY=MYIP
export DISPLAY
xclock


Thanks in advance
[000000]

finger $LOGNAME | grep from | awk '{print $9}' | tail -1