Yes he is cup tied if he has made an appearance in the League qualifiers. Any appearance in the Champions league tournament makes a player cup-tied to one team till the end of the tournament.
Ryan Giggs, the welsh player who played for Manchester United, has played the most CHampions League games. He has played 141 champions league games.
The eldest player to have played in the Champions League was Marco Ballotta. He was 43 years and 253 days old.
It is Clarence Seedorf of Holland.
Ofcourse he can play in the Champions League with a team even if has previously played with another team. But if a player has represented a club in a particular season the CL he cannot then play for another club in the same year's CL.
Not in the same season. The player can't be registered for the competition with the second and will be 'cup-tied'.