Cut-off Points in Linear Discriminant Analysis

Everyone can discuss about the cut-off points in linear discriminant analysis.
I know how to calculate it when there are 2 groups. But, more than 2 groups such as 3-5 groups, is it impossible?

I'm in-charge the application scorecard project and i want to classy customer to 5 groups from initial data set using discriminant analysis and built a discrimination function for new customers and group them by cut-off points.