Traffic limiting per ip or Alias with cache content in squid at full lan speed

[jammes]

Hello !
I want to limit lan users download and upload speed per ip and per alias .But I also dont want that limiter affect cache content of squid i.e also installed in my pfsense box . Only  limit real time internet traffic coming from wan not from squid cache .Squid cache should work at maximum speed …. i.e 100mbps. please help me in this setup....