Hello, i am having an idea, but i think that is impossible 
So, whole idea is when my l2tp client change wan address i must that address put in ipsec in my mikrotik router. Can I make some script or you can help me, to notify me when some device l2tp client changed wan address? In case of l2tp client, when it changed caller ID (for me it is wan address of interface where i have internet and 1 distance in routing).
when have dynamic addressing wan address can change. Can i somehow without get stating ip’s solve this? Just some simple notifications, or something like this?