Short answer: no
Long answer:
- keybinds are account wide anyway (for clarity, keybinds are what button on the keyboard activates what quickslot, and not what skill is in that quickslot)
- for ui scaling, some character specific UI settings, placement etc checkout the functionality provided by the game with the ingame command "/ui" - you can save multiple UI layouts, and scale is just one parameter saved
Some more details can be found here:
https://www.lotro.com/forums/showthr...her-Characters