Connection with Multi-user terminal

In a communication system at least one operational criterion is applied for a group of one or more users. On the basis of such operational criterion, one or more interface rules are generated. An interface rule comprises information that identifies an application that is capable of utilizing two or more communication interfaces, and also a function for determining a communication interface to be applied by that application in communications of the group of one or more users. A profile that comprises interface rules generated on the basis of operational criteria to be applied for a user is created and stored in a user terminal of the user. Use of applications can be matched with operational requirements posed on or by the user, without substantial need to change the applications and/or the configuration of the terminal due to the matching.