The <LocationMatch> directive provides for access control by URL, in an identical manner to <Location>. However, it takes a regular expression as an argument instead of a simple string. For example:
<LocationMatch "/(extra|special)/data">
would match URLs that contained the substring "/extra/data" or "/special/data".
See also: How Directory, Location and Files sections work for an explanation of how these different sections are combined when a request is received