Routing Emails - Send Connector

Hi,

I have an Exchange server 2013 with several accepted domains say a.com, b.com, c.com. I have a Firewall server which acts as a smarthost. My question is can I setup mail flow in such a way that, any emails coming from the domain b.com should use a specific send connector which routes the emails to the smart host.

Any emails coming out of other domains, should be routed directly to the internet using a separate send connector.

Awaiting your kind help.

Thanks and Regards,
Vignes Anand

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Regards, Vignes Anand S