Can one build a multitenant application on developer force by which by each tenant- customer  gets a different view, acess to specific database ?

I was think of Role based Acess ! But here there are those hierarchial roles, but my plan is to implement them such that there are 'n' customers and each can login from a remote machine to acess , customize the app accordingly .

Hoping For a quick reply :

Regards,

Vish_Katharki