For now i have ipsec remote access on cisco asa. There is some way to enforce cisco vpn client or cisco asa to check policy on ic4500 for every user ?
The cisco's VPN server can't be as a enforcer.
You need to add Juniper SSG or SRX as a enforcer.
After establishing VPN connection, you need to check policy through this FW.
You can add the Cisco as a RADIUS client and authenticate them that way. You can send radius attributes to the Cisco as with any RADIUS server.
Hope that helps