The Local Clock Details table is only reported when local clocks are found in the design. A local clock is a clock net routed with regular fabric routing resources instead of global clocking resources. This situation usually occurs when a clock net is not driven by a clock buffer. The information provided by the table is similar to the one found in the Global Clock Resources table.
The following figure shows a local clock net driven by a 7 series MMCM output which directly drives a register clock pin (FDRE/C).