Thanks netblues, what I did was this.
add the remote network(client) in the RW settings:
IPv4 Local networks: local-network,remote network
Latter, I add in the RWOVPN Rules, 1 rule that allow the RW network access the server lan, a 2nd rule that allow RW network access remote network using as gw the LB-GW from the site2site setup.
In the client network, I didn't have to add nothing, this change was only in the server side.
Is working, thanks netblues.