Is there a way to run two separate instances of the dispatcher module within one instance of apache?

For Example:

aem.domain.co.uk - configured as virtual host - uses dispatcher-handler and uses 'dispatcher.any' for configuration

author.domain.co.uk - configured as virtual host - uses dispatcher-handler and uses 'author_dispatcher.any' for configuration

I have tried this in various combinations as follows:

apache.conf - all normal <IfModule dispatcher> statement with the default settings.
aem.domain.co.uk - use the <Directory /> with the <IfModule> and set-handler declaration
author.domain.co.uk - same as above.

each of the virtual host tries to override the DispatcherConfig parameter - but this doesnt seem to work?

Is there a way to achieve this?