can my network guys know the sites i visited??

can they???
i recently got an internet connection{lan network}on my comp.from my comp i took the internet connection to 5 other comp’s in my home.currently i’m not working from the main server,but comp no:5.can te server comp or the guy’s who gave me the network know which sites i visited???those network guy’s know the ip address of the server.with this can they access my comp[comp no:5}??????and know my internet history???


please help!!!