Sorry for the hassle :) but of course it is also possible to go back through previous nodes in eclipse by combining converge gateways so the example i mentioned above would go like this,
start node -> gateway converge -> user task node 1 -> condition (gateway diverge) ->
ok yes -> end node
ok no -> gateway converge
p.s. although oryx designer allows direct connections to previous nodes (haven't tried to compile the package because after editing the process shows blank screen etc.... so that's another issue i'm waiting to figure out or get resolved - relative thread (http://community.jboss.org/message/604125) )