Locked in mortal combat with a group seeking to dismantle its longstanding San Diego power monopoly, giant Sempra Energy and its subsidiary San Diego Gas & Electric have been busy lining up the services of local lobbyists. One member of the utilities’ influence-peddling corral is Lani Lutar, onetime chief of the San Diego County Taxpayers Association. According to a March 3 disclosure filing, Lutar’s Responsible Solutions was paid $975 by Sempra Services Corp, approved by state utility regulators to lobby against so-called community choice aggregations.