The simple answer (without regard to license) is that you can copy the font
from the Fonts folder of one computer to another (by disk, flash drive,
email or any other way you normally transfer files).
According to
http://www.microsoft.com/typography...117&FNAME=Lucida+Calligraphy+Italic&FVER=1.67,
however, the Lucida Calligraphy font is supplied with Access 97 SR2,
Greetings 99, Home Publishing 99, Office 2000 Premium, Office 97 Small
Business Edition SR2, Office 97 SR1a, Office Professional Edition 2003,
PhotoDraw 2000, Picture It! 2000, Picture It! 2002, Picture It! 98,
Publisher 2000, Publisher 97, Publisher 98, and TrueType Font Pack, so
unless you have one of those applications installed on the new computer, you
don't technically have a license for the font.
If you have installation disks from any of those products, you could use
them to install the font(s) you want (or you could claim to have done so).
Realistically, I don't think the font police (multilingual pun?) will come
after you if you just copy the font.