How can i limit Remote Access VPN users, only to a pariticular ip address in may inside network, say 10.10.10.1
If you have an ASA you can simply create a new ACL defining the single inside host to communicate to the network/pool used for the Client VPN users.
You can apply the vpn-filter to the group-policy however doing so all users using that group-policy will inherit that vpn-filter and be restricted to the traffic you have defined within the filter ACL.
If you wish to restrict access for a specific user you can apply that same vpn-filter for that specific user within the user attributes. This filter would not affect connectivity for all of the users connecting to the same group-policy only the user bound to the filter.