Here are a few of the DevFee addresses found within v11:
0xB9cF2dA90Bdff1BC014720Cc84F5Ab99d7974EbA
0x3509F7bd9557F8a9b793759b3E3bfA2Cd505ae31
0xdE088812A9c5005b0dC8447B37193c9e8b67a1fF
0x7Fb21ac4Cd75d9De3E1c5D11D87bB904c01880fc
0x34FAAa028162C4d4E92DB6abfA236A8E90fF2FC3
Now that you've explored the blockchain with these, here's how you can bypass the DevFee without incurring a penalty or installing some malware if you don't think Claymore deserves this fee. It isn't for noobs, so don't ask me details if you don't understand. Pay the man and learn.
1. Don't try anything on your Windows box where Claymore runs. Claymore can detect local, 'private net' addresses (proxies), and can even detect if you 'spoof' a pool's public IP locally by examining the route or the network response times etc... Claymore will penalize you by introducing a several seconds delay between the time a share is found and the time it submitted to the pool. You'll get a decent hash rate still, but your stale shares will increase dramatically. It will also warn you about local pools.
2. Familiarize yourself with how a transparent 'Squid' HTTP proxy works on a NAT-router/gateway.
3. Set up the networking on your NAT-router/gateway similar for Squid, except you're not going to intercept port 80 HTTP traffic, but TCP traffic to port 4444. (Eg: ethermine's port)
4. Get familiar with a Unix program called 'netsed' - network stream editor. It's available only as source code, sorry noobs. Set it up to listen on the NAT-router/gateway port that you have redirected 4444 traffic to and have it send output to eu1.ethermine.org:4444 or whatever your pool is. You're going to want to have it substitute the addresses above with that of your own. Claymore will probably change these with each version, so you're on your own when that happens.
5. Set the default gateway on your miner box to the ip of the NAT-router. (Hint: virtual machines.)
6. If you've got a large farm, you might want to explore the source code of netsed, or other programs, to make your own version that can handle more connections and any future DevFee addresses Claymore might add.
7. I'm not going to help you. Don't ask.