diff -r c85adae9a336 src/settings_type.h
--- a/src/settings_type.h	Sat Jul 30 01:01:06 2011 +0200
+++ b/src/settings_type.h	Sat Jul 30 01:45:20 2011 +0200
@@ -110,6 +110,7 @@
 	bool   station_show_coverage;            ///< whether to highlight coverage area
 	bool   persistent_buildingtools;         ///< keep the building tools active after usage
 	bool   expenses_layout;                  ///< layout of expenses window
+	bool   show_only_own_signs;              ///< hide signs (including signs of stations) that are not owned by local company
 
 	uint16 console_backlog_timeout;          ///< the minimum amount of time items should be in the console backlog before they will be removed in ~3 seconds granularity.
 	uint16 console_backlog_length;           ///< the minimum amount of items in the console backlog before items will be removed.
diff -r c85adae9a336 src/table/settings.ini
--- a/src/table/settings.ini	Sat Jul 30 01:01:06 2011 +0200
+++ b/src/table/settings.ini	Sat Jul 30 01:45:20 2011 +0200
@@ -2353,6 +2353,11 @@
 str      = STR_CONFIG_SETTING_EXPENSES_LAYOUT
 proc     = RedrawScreen
 
+[SDTC_BOOL]
+var      = gui.show_only_own_signs
+flags    = SLF_NOT_IN_SAVE | SLF_NO_NETWORK_SYNC
+def      = false
+
 
 ; For the dedicated build we'll enable dates in logs by default.
 [SDTC_BOOL]
diff -r c85adae9a336 src/viewport.cpp
--- a/src/viewport.cpp	Sat Jul 30 01:01:06 2011 +0200
+++ b/src/viewport.cpp	Sat Jul 30 01:45:20 2011 +0200
@@ -1186,6 +1186,9 @@
 		/* Don't draw if the display options are disabled */
 		if (!HasBit(_display_opt, is_station ? DO_SHOW_STATION_NAMES : DO_SHOW_WAYPOINT_NAMES)) continue;
 
+		/* Don't draw if station is owned by another company and only own signs should be shown */
+		if(_settings_client.gui.show_only_own_signs && _local_company != st->owner) continue;
+
 		ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &st->sign,
 				is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT,
 				(is_station ? STR_VIEWPORT_STATION : STR_VIEWPORT_WAYPOINT) + 1, STR_NULL,
@@ -1201,6 +1204,9 @@
 
 	const Sign *si;
 	FOR_ALL_SIGNS(si) {
+		/* Don't draw if sign is owned by another company and only own signs should be shown */
+		if(_settings_client.gui.show_only_own_signs && _local_company != si->owner) continue;
+
 		ViewportAddString(dpi, ZOOM_LVL_OUT_4X, &si->sign,
 				STR_WHITE_SIGN,
 				IsTransparencySet(TO_SIGNS) ? STR_VIEWPORT_SIGN_SMALL_WHITE : STR_VIEWPORT_SIGN_SMALL_BLACK, STR_NULL,