which law and order SVU episodes does Paul Wesley play in?

He was in Wrong is Right from season 2 episode 1.

Here is a summary

In a continuation of the internal investigation into the psyches of the Special Victims Unit staff, the focus turns to two detectives -- one who wants to seduce and one who wants to destroy some of the shady characters they encounter on the job. Meanwhile, Detective Stabler's (Christopher Meloni) home and work lives blur horrifically when his daughter Maureen (Erin Broderick) witnesses a gory crime scene as she accompanies her father in discovering the burning dead body of an analyst for a major defense contractor. While ambitious new Assistant District Attorney Alexandra Cabot (Stephanie March) pursues the uncooperative employers of the victim, and his missing ward, with equal fervor, Detective Odafin "Fin" Tutuola (Ice-t) transfers to the Special Victims Unit from Narcotics to join in the investigation. Mariska Hargitay, Dann Florek, Richard Belzer and Michelle Hurd also star.

You can watch it here: http://www.surfthechannel.com/video/380/51341.html

He was also in the episode Ripped from season 7episode 4.

Here is a summary

When the son of Detective Stabler's former partner is suspected of attacking a classmate at school, Stabler's emotions toward the case get him suspended from the squad.

You can watch it here: http://www.surfthechannel.com/video/380/51313.html

Paul Wesley Law And Order

"Ripped" in 2005 and "Wrong is Right" in 2000.