Can i have like mods at multiplayer, I am talking about a texture mods and play multiplayer while my friend does not have any mods ?
That's a question with a somewhat more complex answer based on whom is hosting. If your friend is vanilla, and is hosting, then while you can use mods that simply change textures (tileswaps, palette swaps, that sort of thing), if the modded texture has an entrance or exit in a different location then it isn't going to work right, and you'll be walking into a wall to get out. If you are modded and hosting, and your friend is vanilla, then the buildings will conform to your modded textures, and as such if they modify where a building's entrance or exit is, your friend may have difficulty getting into or out of them. In general, any mod which affects mechanics in any way (including anything in the Content/Data folder) is going to be dependent upon the host.
