sneak works in addition to aux1, for inverting pickup-as-group or placing single territory markers

rules.lua

@@ -346,7 +346,9 @@ function lc_liberties.handle_placement(pos)
 end
 
 function lc_liberties.handle_territory_fill(itemstack, placer, pointed_thing)
-    if (placer.get_player_control and placer:get_player_control().aux1)
+    local control = placer.get_player_control and placer:get_player_control()
+
+    if (control and (control.aux1 or control.sneak))
             or
         (pointed_thing and pointed_thing.under and minetest.get_node(pointed_thing.under).name == "nc_items:stack")
             then
@@ -374,7 +376,8 @@ end
 function lc_liberties.handle_dig(pos, node, digger)
     cache = {}
 
-    if (digger.get_player_control and digger:get_player_control().aux1)
+    local control = digger.get_player_control and digger:get_player_control()
+    if (control and (control.aux1 or control.sneak))
                 ~=
             (minetest.registered_items[node.name].groups.go_territory_marker ~= nil)
                 then