pix multiple ipsec tunels dynamic ip address

Yes you can.

In a dynamic map you can still create an entry per tunnel an specify parameters such as the match address

no] crypto dynamic-map dynamic-map-name dynamic-seq-num match address acl_name

To only problem is that only the remote site will be able to initiate the tunnel. But depending on your needs it may not be a problem.

I hope it will work, next week I will get additional equipement and try with several tunnels. But I still do not understand how PIX will know wich IP subnet is behind which peer. Peers are routers with wan interface to provider (dynamic addresses), and eth to network with devices that need secure communication to central site

thanks