Squid

acl Clients1 src 192.168.1.0/24
acl Permitlist1 dstdomain "/etc/squid/Permitlist1.txt"
http_access allow Clients1 Permitlist1

acl Clients2 src 192.168.2.0/24
acl Permitlist2 dstdomain "/etc/squid/Permitlist2.txt"
http_access allow Clients2 Permitlist2

http_access deny all

/etc/squid/acl/whitelist.txt

.test.com
.example.com

acl Denylist1 dstdomain "/etc/squid/denylist1"
http_access deny Denylist1

acl host1 src 10.0.0.1
http_access allow host1

acl host2 src 10.0.0.2
http_access allow host2

acl servers src 10.0.0.1 10.0.0.2
http_access allow servers

logformat squid %{%Y/%m/%d %H:%M:%S}tl %ts.%03tu %6tr %>a %Ss/%03>Hs %<st %rm %ru %[un %Sh/%<a %mt