The Official Pinoy Dota 2 community has reached thousands of members and is still rapidly growing.
As a veteran DotA player, I would recommend joining the Pinoy Dota 2 community online since the Philippines has one of the biggest DotA markets in the world - probably only 2nd to China.
Dota 2 is projected to become the most popular online game in the Philippines and the HUGE online Pinoy community surrounding the game is a testament to Dota 2's influence in the country.
If you like discussing strategies, finding out bugs and cheats, arranging scrimmages and joining the tournaments, joining the Filipino Dota 2 community is the way to go to get connected with the hundreds of thousands of Pinoy Dota 2 players.
They're giving away free invites via their Facebook / Steam group. (Got mine from there.)
Steam Group: http://steamcommunity.com/groups/dota2phcommunity