Application firewall suggestions

@dalto, you helped me to setup a killswitch for my vpn with ufw rules here.

ufw status verbose
Status: active
Logging: on (medium)
Default: deny (incoming), deny (outgoing), disabled (routed)
New profiles: skip

To                         Action      From
--                         ------      ----
Anywhere                   ALLOW OUT   Anywhere on tun0          
192.168.50.1               ALLOW OUT   Anywhere                  
1194/udp                   ALLOW OUT   Anywhere                  
Anywhere/ipv6              DENY OUT    Anywhere/ipv6

Do I need to enable the firewall in OpenSnitch as well?