The German, 38, has played just once for the north London club since August after slipping behind Spaniard Manuel Almunia in the pecking order.
And Lehmann does not believe he is being judged fairly by Wenger.
"My coach confirmed my impression that he uses a different measuring stick to evaluate Almunia. For me this was a disappointment," he said in The Times following discussions with Wenger last week.
"This statement forces me to think about my situation. I have to ask myself what is still realistic and possible for me at Arsenal? When he says something like that, it's going to be difficult for me.
"It's very frustrating. When I see the performances on the field, I get angry and I have to clench my fist in my pocket."
But unless he is allowed to leave the Emirates Stadium for free when the transfer window opens in the new year, Lehmann is resigned to staying put until the end of the season.
"If Arsenal demands a transfer fee for a 38-year-old reserve goalkeeper, I might as well stay," he said.
Poor lemon
talk so much... 