Try ether:
=IF(ROWS($A$1:$A1)>COUNTIF('Hot Zone Customers'!$C$2:$C$561,$C$4),"",INDEX('Hot Zone Customers'!$C$2:$T$561,SMALL(IF('Hot Zone Customers'!$C$2:$C$561=$C$4,ROW('Hot Zone Customers'!$C$2:$C$561)-ROW('Hot Zone Customers'!$C$2)+1),ROWS($A$1:$A1)),COLUMN(R$1)))
or
=IF(ROWS($A$1:$A1)>COUNTIF('Hot Zone Customers'!$C$2:$C$561,$C$4),"",INDEX('Hot Zone Customers'!P$2:P$561,SMALL(IF('Hot Zone Customers'!$C$2:$C$561=$C$4,ROW('Hot Zone Customers'!$C$2:$C$561)-ROW('Hot Zone Customers'!$C$2)+1),ROWS($A$1:$A1))))
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