How to define OpenVPN network in haproxy ACLs

I would like to define OpenVpn network in haproxy ACLs.OpenVPN server and haproxy is running on the same server (X.X.X.X/32).It is possible to set up in haproxy to allow requests only from the OpenVPN network? I tried something like this, but it is not working:

acl vpnnetwork src 10.10.0.0/16

Thanks in Advance

I'm attaching my OpenVPN conf file:

port 1194proto udp6dev tunca /etc/openvpn/keys/ca.crtcert /etc/openvpn/keys/server.crtkey /etc/openvpn/keys/server.keydh /etc/openvpn/keys/dh.pemcrl-verify /etc/openvpn/keyscrl-verify /etc/openvpn/keys/ca-crl.pemtls-auth /etc/openvpn/keys/ta.key 0tls-serverauth SHA256cipher AES-256-CBCtls-version-min 1.2tls-cipher TLS-ECDHE-ECDSA-WITH-AES-256-GCM-SHA384:TLS-ECDHE-RSA-WITH-AES-256-GCM-SHA384:TLS-DHE-RSA-WITH-AES-256-GCM-SHA384:TLS-ECDHE-ECDSA-WITH-AES-256-CBC-SHA384:TLS-ECDHE-RSA-WITH-AES-256-CBC-SHA384:TLS-DHE-RSA-WITH-AES-256-CBC-SHA256client-to-clientserver 10.10.0.0 255.255.0.0ifconfig-pool-persist ipp.txtkeepalive 5 30persist-keypersist-tunuser nobodygroup nogroupstatus openvpn-status.logstatus-version 1log-append /var/log/openvpn.logverb 3