How to group points (xy coordinates)

Hi, I'm using kmeans to group a random number of points in a xy axis.

Is there any way of doing it but limiting the number of points per group. I mean, if I want 2 groups of points but in my xy axis I have like 100 points close to each other and another 20 points far away from the other 100 points. If I run kmeans function, it will probably join the 100 points and the 20 points in two different groups and I would like to limit the number of points, for example, by 80.

Is it possible to do?

Thank you very much