You can deliver a dynamic library using 32-bit LispWorks or 64-bit LispWorks on Intel-based Macintosh machines.
However you cannot deliver a dynamic library using any LispWorks product on a PowerPC Macintosh.
LispWorks does not support dynamic libraries for the PowerPC architecture. Therefore you cannot build a universal binary dylib.
LispWorks Delivery User Guide - 13 Dec 2011