[Exim] multiple identical recipients

I'm using Exim 4.30. I have the received_recipients log_selector
enabled. If the same recipient is given multiple times either over smtp
or for locally-injected messages, the received log line lists the
recipient multiple times.

At what point does suppression of multiple copies to the same recipient
occur? Is it possible to configure Exim such that a message with the
same recipient given multiple times would be delivered differently than
a message to the same recipient given once? (A redirect to another
address in a rcpt acl, for example, is not possible, right?) If not, I
think multiple identical recipients should be collapsed in the received
log message when received_recipients is enabled.

Thanks,
Christian