You can use

.option POSTTOP

to output only the node voltages and source currents at the top level of the circuit hierarchy.

You can use:

.option POSTLVL=n

If you want to output only the node voltages and source currents at a specific level of hierarchy specified by n.

One caution, the POSTTOP and POSTLVL options will be ignored if

.option PROBE

is also in the netlist.