Single-Ton object Datas can be shared with other users

i have a doubt, i am implementing the single ton design pattern in the application. the single object can be created only for the class. the same object can be shared across all the users who ever using application simultaneously. Is there any possible to share a data with others. because single object is associated with the data. EX: There are 2 users accessing the application. i am accessing the page called "Student". i hold the student data in the dataset. if another user trying to access the same page called "Student". is there any discrepancy to showing data for the another user. since there is a single object only to connect it.

Please Suggest on this.