This depends on the sharing settings of the network you are trying to access.
To access a network, go to the ‘More’ tab and choose ‘Change network’ or if you are in the main welcome screen tap on ‘My Networks’. You can then “Log in to network” or select an existing network (if any are available).
If you “Log in to network” you will have to know the administrator email address and password that has been set when the network was shared.
If you select an existing network the app may or may not request a password is entered (depending on how the network has been shared).
If a network does not use a gateway then you will need to be within Bluetooth range of the network.
For more information see the article “What do the different sharing settings mean?” (http://support.casambi.com/a/solutions/articles/12000017044).