Keyfiles contain one or more keys. A key is a sequence of 28 ASCII upper case letters and digits between 2 and 9, inclusive.
Each key should be placed on a separate line in the file. There should be no leading white space on a line before the start of a key. Characters after the key but on the same line as it are ignored, so may be used for comments. Indeed it is helpful to comment each line with the name of the product that key enables.
Key files for more than one host can exist in the same keyfile.
A single key allows you to use a particular major version of LispWorks (in this case 5), on one host machine, until the expiry date of one license, where relevant. To run LispWorks on a different machine you will need another key.
Delivery, KnowledgeWorks, LispWorks ORB and CLIM 2.0 each need their own keys.
LispWorks Release Notes and Installation Guide - 23 Dec 2011