I´m using Normal setting to Internet backround with Avast. There´s something what I don´t undertsand. What means: Pass local internet traffic ?
I asked this before having no answer 
Mayde my spelling was incorrect…
Local comunication is made inside of your own computer, from one ‘part’ to another, one program to another.
So, if you use a local proxy, for instance, an annonimizer application, the traffic is redirected to this application and in order to scan it you must allow the local traffic and then we have: Internet > local proxy in your computer (127.0.0.1) > avast.
Did I make myself clear and simple? :
Yes you did Thanks ! So there´s no need to use it
You only have to use it if you use a local proxy application.
Is local proxy the same proxy which my Internet service offers ?
Oh dear, I´m very confused :
The ISP (Internet Service Provider) that you pay could offer some proxy server features.
Local proxy should be a program installed in your computer that redirects the traffic through itself.
Well, there´s no need to do anything I guess…