Multiple Capture Custodianship (aka Multiple Prey Custodianship, Multiple Victim Custodianship) is custodianship that always involves four or more total counters, both those capturing and those being captured or converted. Here, a counter captures multiple (two or more) opposing counters in a row by sandwiching them between two of his own, all in a row (orthogonal and/or diagonal, depending on the game). Some games will capture the opposing counters, others will convert them.
See Hasami Shogi, Reversi