The Dog Pound gang was a residing gang in Lamar. They were created from the neighborhood toughs and part neighborhood racket. They were led by Big Dog, but all members ultimately served the exile known as Sammy "Lilac" Wien.
The Merovingian, who planned to smuggle the kill-code for the oracle, required a way of successfully smuggling the code under the noses of Zion and the oracle's guardians. The Merovingian operatives approached the Landlord, who found a key for the backdoors of the Matrix buried in the Mahath Tower construction site, saying he will give it to them in exchange for revenge against the local Dog Pound gang.