As far as I am aware this type of program is already available as a small freeware standalone program.
DavidR,
Do you know the name of that program or a link perhaps?
Thanx.
Though, I still think it would be better integrated with avast! if it was "small" enough (something like behavior blocker for instance).
I have never sought one (I can't access broadband, so no router/firewall option), although they have been discussed here, but I don't think names were named.
They are only of use for outbound program traffic, otherwise they become a more bloated piece of firewall software.
So unless you have a hardware router with firewall properites you would still be vulnerable Or a software firewall to protect against inbount traffic, in which case the program access software is redundant.