The Federal Communications Commission is caught in a behind-the-scenes battle over how to make the Info Highway more diverse. Women and African-Americans are fighting each other for best breaks when the FCC auctions off new wireless communications licenses this fall. Each group claims it deserves more preference because of past bias. Congress mandated preferences for both groups, and the FCC is likely to make peace by treating them the same when it unveils its rules on June 29. They could both get 20% to 30% discounts, low-cost loans, and small downpayment requirements.