The owners of a more than five-acre parcel in the Georgica Association on the Wainscott side of Georgica Pond went before the East Hampton Town Zoning Board of Appeals on March 4, seeking variances that would allow them to subdivide it into two buildable lots. Whether the board will approve the requests may hinge on two things: The property has been almost entirely cleared of natural vegetation and, in an unusual arrangement, the applicants, Florence and Ken Joseph, own the land but do not control three of the four residences on it.