Description:
When a player activates a CDLC in the Arma 3 launcher, he will want to play on servers compatible/running the CDLC.
As such there should automatically a filter applied to see only servers running the CDLC.

Reasoning:
User experience. It is confusing and annoying to see all Arma 3 servers - you want to see (only) those you can actually play on.

Additional info:
As Steam protocol already transmits the info (isDLC flag), it should be a mere local filter for the server set to be shown for the Arma 3 launcher.