Multiple E-mail in dropdown after pipe

I’m currently using a drop down menu so users can select a department to send an e-mail to. All of this works correctly. However, in some cases I would like to send a copy of the message to more than one e-mail address. I’m currently using pipes so that the end-user sees the name of the department instead of the e-mail address. So in the code side of things I’ll have (an example)
"Dept1|[email protected] Dep2|[email protected] Dep3|[email protected] "
Is there a way that if someone selects say, Dep1 that the message would go to [email protected] AND [email protected].

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