I was just reading this site:

http://www.bearcanyon.com/dotnet/#AssemblySettings

I downloaded the sample code (link below).  It is supposed to allow you to have a config file per assembley e.g. MyAssembly.dll.config. 

I haven’t looked at the code, but I guess you would just write something that uses reflection to find the assembly name, and then look for an xml file to read.

AssemblySettings.zip (10.5 KB)