I'm able to send lemur values to SC with the new OSC system(in SC).
Thanks to Marinus for his help.
adapted from the OSCresponderNode Help:
n = NetAddr("Lemur IP", nil);
o = OSCresponderNode(n, '/Fader/x', { |t, r, msg| msg.postln }).add;
p = OSCresponderNode(n, '/Switches/x', { |t, r, msg| msg.postln }).add;
o.remove;
p.remove;