Is it possible to setup a clustered UserApp without using MultiCast?

We are running IDM 3.5 all on Linux. Our UserApp is setup with an
external Oracle DB. We want to run two UA Servers (both VM's) behind an
L4 switch. Reading the Novell docs, they primarily hand off a lot of
the technical clustering details to the JBOSS Wiki. But the bottom
line appears to be JBOSS clustering relies on Multicast. We run our
UA's on VMWare Infrastructure, and there is no way to guarantee that
both servers will home on the same physical switch. Our network folks
are loath to enable Multicast on the network, which has been the case
almost everywhere I've been.

Is it possible to setup a UA/JBOSS cluster using unicast rather than

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