Multisite user registration in subsites

Hi,

Does anyone have any experience here with WP-client plugin on a multisite? This is what they write on their website and I just wondered whether there would be any difference using http://www.mainsite.com/site1 rather than http://www.site1.mainsite.com. I will be contacting them personally but wanted to see if anyone on here knew first. Thanks.

"WP-Client will work on Multisite installations, but does not share users, files, HUBs or Portal Pages across the entire network. For example, if you create a client on Site B, that client will not be able to also login with the same capabilities at Site C. However, with WP-Client installed on Site B, the plugin will function as intended on Site B only, just like it would on a normal standalone installation of WordPress.

Each unique URL that contains a site ( alpha.maindomain.com, brava.maindomain.com, charlie.maindomain.com ) will need to be entered separately in your Control Panel in order to install on that URL. Meaning, a Single Site WP-Client license does not automatically entitle every site on a multi-site network to install/use WP-Client."