I think it would be useful to have some field to inform the wiki (project and/or language) to which configuration requests refers to.
Right now, the wiki is not informed in a consistent way. E.g: the users may inform the database name (enwiki, frwikibooks, etc...) or the language+projectname (Portuguese Wikipedia, Spanish Wiktionary) or specify that only in the bug description/comments. A real mess.
I don't know what to do in case of configuration changes which refer to more than one wiki though. E.g.: some change may affect all wikis in Portuguese, other change may affect the Wikibooks projects in all languages, and more complicated combinations are also possible.