I can think of several possible approaches:
1) Use a config based on 'default', which doesn't include clustering features. If you are using any other features from 'all', copy them over.
2) If you have to use a config based on 'all', http://wiki.jboss.org/wiki/Wiki.jsp?page=JBossASTuningSliming has tips on disabling clustering features.
3) Probably simplest: pass -Dbind.address=127.0.0.1 when you start JBoss. This will cause the JGroups channels to bind to the loopback interface, preventing your machine joining the cluster.