Hi, I also use Comodo Firewall and it is not an easy software, yo have to know more about computer communications than with other firewall software. IP address 127.0.0.1 is known as system or loop IP address, that means your own PC.
You can authorize this connections. Firewalls use to be very restrictive with connections to the loop address, but if you know the applications and if you consider them safe, there won´t be any problem.