You can add multiple MailChimp accounts to your Leadfeeder.
Follow these steps to connect another account:
Step 1: Navigate to your MailChimp settings by clicking your name on the right upper corner and selecting Settings for... from the menu.
Step 2: Go to tab Website and select Mailchimp on the left side.
Step 3: Select Add another MailChimp account
Step 4: Follow the steps to connect the new account