Oh yes, Warp 3 can very well co-op within in a network, either using TCPIP or against a LAN server such as OS2 or even a NT-domain. Sharing resources betwen system works also without any problem as well. Good news also is that most of the applications that have been writen for Warp 4.x works out. Only now recently there has been applications (such as latest version of MySql 3.32.50) that needs the 32-bit TCP/IP that came along with latest CP (version 2).
So there shouldn't be any problem as I see it.