You can add multiple Mailchimp accounts to your Leadfeeder.
Here's how to connect another account:
STEP 1: Navigate to your Mailchimp settings by clicking your name on the right upper corner and selecting Integrations for... from the menu.
STEP 2: Select Mailchimp on the left side.
STEP 3: Select Add another Mailchimp account.
STEP 4: Follow the steps to connect the new account.