Sorry for the stupid question, and for my bad english 
How to add to address list a multiple subnets?
I tried to do it like this:
[admin@Kin] > /ip firewall address-list add list="clients_subnets" address="192.168.254.0/24,10.0.0.0/24,10.10.10.0/24"
value of address must have nemask after '/' either as number or as ip value
[admin@Kin] >> /ip firewall address-list add list="clients_subnets" address="192.168.254.0/24","10.0.0.0/24","10.10.10.0/24"
expected end of command (line 1 column 80)
[admin@Kin] >> /ip firewall address-list add list="clients_subnets" address="'192.168.254.0/24','10.0.0.0/24','10.10.10.0/24'"
value of address must have ip address before '/'