The likes of the former Genk striker and Andreas Weimann have attracted interest after impressing this season, and the manager is hoping to reward them with improved terms
The striker's ever-increasing reputation was further enhanced after a hat-trick in the club's 6-1 demolition of Sunderland took his tally to 25 goals for the season.
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"There's definitely a few lads you would look at who I think have done really well," Lambert told The Sun. "It will be my decision. If we get through this period of time then we'll sit with everyone and explain.
"There's a few of them that you would think: 'yes, he's done great' and Matty's definitely one of them."
Lambert has previously insisted no offer is currently on the table for Benteke, and now dismissed the possibly of a release clause being added with a number of clubs thought to be monitoring the striker's situation.
"I don't think you can put any figures in because it just creates problems," he added.