Spec Limits are saved as column properties in a data table. Only one set of spec limits can be saved for each column. Therefore, you will have to separate your parameters, (i.e. Parameter 1, Parameter 2) as independent columns for each of the samples, (i.e. Parameter 1:Sample 1, Parameter 1:Sample 2)
There is a built in Spec Limit Manager that can help you populate the column properties. It is available at:
Analyze=>Quality and Process=>Manage Spec Limits
See Tonya's comment below
Jim