Hi
if you can help me with a script that i can put in PPP profile ((on connect)) that can add the IP address of each new connected client to a specific dynamic address list i would be so much appreciated
Best Regards

You don't need a script for that, just configure the address list in the PPP Profile.

Resurrecting an old tread here, but want to add that on V 6.45.6 the profile>address list setting adds the remote address of the ppp service and not the local address. In my case I want to use it to hairpin nat to a local server via dyndns, and it works when I specify !<local_ppp_ip> but when I use !<address_list_ip> it won't work because it uses the remote (or network) IP.

In that case you could configure On Up and On Down scripts in the PPP profile to add/remove the address in a list.