You can create multiple bank accounts for your filing committee. These are filing committee specific and multiple filing committees can not share a single bank account.
To add a new account, go to Settings > Filing Committees. Chose the committee and click on Bank Accounts. Click on the "Add Account" button and enter the information about the new bank account. Then click save changes and you will have created the new account.
When creating transactions, you will choose which bank account to assign the transaction to. Each transaction can only be assigned one bank account.