Need to use multiple email addresses with one user (one CRM account)

Need to use multiple email addresses with one user (one CRM account)

I have one CRM Account and one business. I am the only user. I'd like to, ideally, be able to assign tasks/events to different email addresses (the reminder emails). Am I able to do that? I need to track different events separately and use the different emails to do so. I have added my second email address as a secondary, along with my primary, but when, for example, I'm in a Lead, and go to add a task/event, the email reminder does not give me the option of selecting from the primary or secondary email address. Please let me know if this is able to be done, and i'm just not seeing how.