There is no direct way to do this but you can setup a script on the two printers something like the following. The key is to create a special shared account that is used as the quota of pages printed in color.
/*
* Charge Printing to a particular Shared Account for Color Limiting
*/
function printJobHook(inputs, actions) {
if (inputs.user.isInGroup("EverestUser")) {
// Test if the job is color (contains at least 1 color page)
if (inputs.job.isColor) {
// Charge the job to the "PrinterLimit" shared account.
actions.job.chargeToSharedAccount("PrinterLimit");
// Record the reason for free printing in the job comment.
actions.job.addComment("All prints charged to PrinterLimit");
//When Shared Account quote is depleted Color jobs will no longer print
}
// Test if the job is Grayscale
if (inputs.job.isGrayscale) {
// Add your action code here
//No Action Required
}