The equivalent is org.lwjgl.opengl.PixelFormat.
It has a "samples" field.
If using org.lwjgl.opengl.AWTGLCanvas, there are constructors taking a org.lwjgl.opengl.PixelFormat parameter.
If using org.lwjgl.opengl.Display, there are create() method overloads taking a org.lwjgl.opengl.PixelFormat parameter.