The Include entries allow you to force the inclusion of log records based on hostname, URL, user agent, referrer or username. They take precidence over the Ignore entries. You can use Ignore/Include combinations to selectivly process parts of a web site, but it is extremely inefficent! Avoid doing so if possible (ie: grep the records to a seperate file if you really want that kind of report).
An example: Only show stats on Joe User's pages by adding "*" to the Ignore URL box and adding "~joeuser*"to the include URL table.