根據合同上這段話：

If, at any time during or after the Listing Period, the Property is sold to tile lessee named in such lease agreement or its successors or assigns, the Owner shall pay to the Broker a further commission equal to 6.5 %of the price paid to the Owner therefore.

是包括這個租客或者這個租客的繼承人、指定人都算。除此之外的其它新租客就不算了。