The function
pushnew-to-process-private-property
pushes
value
to the value of the private property associated with
indicator
for the current process.
It behaves just like pushnew-to-process-property.
process-private-property
pushnew-to-process-property
remove-process-private-property
get-process-private-property
LispWorks User Guide and Reference Manual - 21 Dec 2011