Washington — Foreign lobbying ties in this presidential campaign reach beyond Billy Carter's Libyan connection. Other persons close to both President Carter and Republican challenger Ronald Reagan either currently represent foreign interests or have done so in the past.
The most highly publicized foreign lobbyist is the President's brother, who registered earlier this month with the Department of Justice as an agent for the radical north African government of Libya and disclosed that he had received $ 220,000 in "loans."
Another man linked to the Carter re-election campaign, Washington lawyer Richard Shadyac, also is registered as an agent for Libya, at pay of $4,000 per month. He says he works for the Carter campaign rallying support among Arab-Americans, but campaign officials deny any formal relationship.
In the Reagan camp, the public relations firm headed by two of the candidate's closest aides, Michael Deaver and Peter Hannaford, has been on the payroll of the Republic of China (Taiwan) for more than 2 1/2 years. Current fee: $5,000 per month.
The Deaver & Hannaford firm has assisted Ronald Reagan on speeches, newspaper columns, press releases, and other public statements urging the restoration of official relations with Taiwan dropped in 1978 when President Carter granted diplomatic recognition to The People's Republic of China.
Mr. Reagan's chief foreign-policy adviser, Richard V. Allen, lobbied here for the Portuguese African territories of Angola and Mozambique in 1973 and 1974 before the success of their struggles for independence, Justice Department records disclose
Mr. Allen's consulting firm, Potomac International Corp., was paid $105,160 in fees and expenses for its work on behalf of Portuguese Africa -- efforts that presumably would not facilitate a continuation under a Reagan presidency of the current thaw in relations between the United States and Mozambique.
The Reagan foreign policy aide also has said he has worked for Japan.
Reagan's campaign manager, William J. Casey, is on leave from the New York law firm of Rogers & Wells, which did nearly $500,000 worth of lobbying for France's national airline successfully seeking to open US skies to the Concorde supersonic jetliner.
Within the Carter campaign, the opinion-sampling firm of presidential pollster Patrick Caddell, Cambridge Reports, Inc., has undertaken similar work for Saudi Arabia.
The Washington law firm of a lobbyist-lawyer who helped the Carter administration lobby for Senate passage of the Panama Canal and strategic arms limitation treaties, Thomas H. Boggs Jr., recently took on as a client the troubled Central American nation of Guatemala. In the past it has represented, among others, South Korea.
Counsel to the President Lloyd N. Cutler, who informally advised Billy Carter in the Libyan affair, was active in representing the government of the Dominican Republic in the early 1960s. The Washington law firm in which he was a senior partner, Wilmer, Cutler & Pickering, was that government's agent here, and the firm's services included a trip to the Carribbean nation by Mr. Cutler in 1963.
Foreigners are barred by law from contributing money to American political campaigns, but their registered agents are not.
Donors to the presidential primary race of Reagan's vice-presidential running-mate, George Bush, include former CIAdirector William E. Colby, now an agent for Japanese business interests (he gave the maximum $1,000), and Mrs. Anna Chennault, longtime advocate for the Taiwan government.