<Rules>
...
<FilesIncludedIntoProject enabled="true">
  <FileName>*.cs</FileName>
  <Exception>
    <Project>ProjectToExcludeFromCheck.csproj</Project>
  </Exception>
  <Exception>
    <Project>ProjectWithSpecificException.csproj</Project>
    <FileName>ProjectSpecificException*.cs</FileName>
  </Exception>
  <Exception>
    <FileName>*.global.exception.pattern.cs</FileName>
  </Exception>
</FilesIncludedIntoProject>
...
</Rules>