Does CIS have an Email scanner, a Web scanner, a P2P scanner, etc ?
No it does not !
Comodo's philosophy here is that malware has to hit the memory or the hard drive to get activated. And those 2 parts are scanned. Al other "scanners" won't add anything to your protection level(s).
So for example if you receive an email with an infected attachment you won't get an alert, if you try to open/save it you will. This reduces resources and yet makes CIS a very fast, light & powerful Suite.