This is what the manual says
ABOUT MULTIPLAYER
VAICOM PRO is fully compatible with Multiplayer and has an advanced feature set for MP-specific use. In Preferences you can enable the ‘Use with Multiplayer’ option (if you have a PRO license) which allows you to use VAICOM PRO in the same way in Multiplayer mode as with Single Player mode. The plugin maintains a state picture of the mission environment provided by the multiplayer server. The addressable AI units are available for communications in the same manner as with Single Player in as far as mission design is compatible with standard functions.
Prerequisites
For working with Multiplayer, on the MP page the ‘Use with Multiplayer’ setting must be enabled. On the MP server, the setting Allow Player Export must be enabled.
MP Server Special Menus
Through the ‘Import F10 Menus’ function it is possible to add server-specific commands to the voice commands set. Imported F10 menu items get ‘Action’ in front of the phrase: for example an imported menu item ‘Push to Waypoint 2’ would become ‘Action Push to Waypoint 2‘ on import. This can then become anything you like in the keywords editor. This import will only work if the server has implemented the F10 menu in the standard compatible manner (which is the case for most servers).
MP limitations
Multiplayer mission designers can take great liberties in mission design, e.g. by introducing custom callsigns, custom menus and all kinds of other tweaks outside of the default spectrum. VAICOM PRO cannot support these by default. Where the mission design makes use of the standard features, VAICOM PRO will support them. But some limitations may apply on some specific servers. Nevertheless, VAICOM has a comprehensive toolset built-in to do complete dynamic AI comms in Multiplayer mode, working in mostly the same manner as in Single Player.
If you use radio for rearming, ATC info, in flight refuelling even talking to your AI crew it is better than using menus or the wheel for Jester