It means that that player uses a program to help calculate their moves (mainly I believe in Chess).  Which is legit and used in a lot of cafe's for chess games/tournaments.

Yes, the system put it there by itself.

How does the system know that player might be using program?

yep how does fod know that

ill never underestimate fod they know everything

So??  If fod put the icon in player info because they are using a program to advance, and player has not been warned or banned, am I to assume that using a program is leagal?

*LEGAL...Sorry. Tipo. mi BAD.

Using programs to calculate moves is legal by FoD rules but the player has to put it in their info that they use it so that a possible opponent will know they use a program to play a game, if a player uses a program and doesn't state it in their info then it is illegal to do.

Thank you for clearing that up. 

Then what about unsubbed players? They can't state it in their info because they're not subbed.

Player 

might

 use program. This isn't definitive.

I'm just stating what I heard awhile ago.  Maybe someone can come in and clear it up for you.

Unsubed players CAN state that in there info. 

I found this in the rules ofUsing a computer program with board games 
Using a computer to decide your moves in a board game on FlyOrDie is allowed.
FlyOrDie members have the right to know if they are playing against a computer. Therefore FlyOrDie uses a system to detect suspected program use, which will be indicated on the concerned players' info screen with a small icon. 
This pertains to NON subs as well.