It would be nice if you could click on a player and go directly to his ranking
eg to invite to your tribe
The only possibility so far is to go to the hole table to look him up
If the number of players will increase it will become difficult
There is a 'search' button if you know their user name. It's to the right of the 'Boards' button on the top of the in-Game screen.
Ok I will use that
Note that in addition to search there is a button to go directly to the user profile from the city in the worldmap view:
That takes you to their profile window where you may in turn use the "Actions" menu to invite the player: