diff --color -Nur glibc/resolv/res_init.c glibc_b/resolv/res_init.c
--- glibc/resolv/res_init.c	2023-09-11 23:15:02.377718008 +0200
+++ glibc_b/resolv/res_init.c	2023-09-12 14:15:53.532479227 +0200
@@ -258,6 +258,8 @@
   char *cp;
   size_t buffer_size = 0;
   bool haveenv = false;
+  char struid[24];
+  unsigned int uid = getuid();
 
   /* Allow user to override the local domain definition.  */
   if ((cp = getenv ("LOCALDOMAIN")) != NULL)
@@ -303,6 +305,11 @@
    && ((line)[sizeof (name) - 1] == ' '           \
        || (line)[sizeof (name) - 1] == '\t'))
 
+#define MATCH_STR(line, name)                       \
+  (!strncmp ((line), name, strlen (name))     \
+   && ((line)[strlen (name)] == ' '           \
+       || (line)[strlen (name)] == '\t'))
+
   if (fp != NULL)
     {
       /* No threads use this stream.  */
@@ -324,6 +331,56 @@
           /* Skip comments.  */
           if (*parser->buffer == ';' || *parser->buffer == '#')
             continue;
+          /* check for user specific config */
+          if (!strncmp(parser->buffer, "uid", sizeof("uid") - 1))
+            {
+              cp = parser->buffer + sizeof ("uid") - 1;
+              if (*cp == '+' || *cp == '-')
+                {
+                  /* Get uid for comparism with user speicific configs */
+                  snprintf(struid, 24, "uid%c%u", *cp, uid); 
+                }
+              else
+                continue;
+
+              if (MATCH_STR (parser->buffer, struid))
+                {
+                  if (*cp == '-') // Remove for user
+                    continue;
+
+                  cp = parser->buffer + strlen(struid);
+                  while (*cp == ' ' || *cp == '\t')
+                    cp++;
+                  if ((*cp == '\0') || (*cp == '\n'))
+                    continue;
+
+                  cp = __strdup (cp);
+                  if (cp == NULL)
+                    return false;
+                  snprintf(parser->buffer, strlen(cp), "%s", cp);
+                  free(cp);
+                }
+              else
+                {
+                  if (*cp == '+') // Remove for user
+                    continue;
+
+                  while (*cp != ' ' && *cp != '\t')
+                    {
+                      cp++;
+                    }
+                  while (*cp == ' ' || *cp == '\t')
+                    cp++;
+                  if (*cp == '\0' || *cp == '\n')
+                    continue;
+                  
+                  cp = __strdup (cp++);
+                  if (cp == NULL)
+                    return false;
+                  snprintf(parser->buffer, strlen(cp), "%s", cp);
+                  free(cp);
+                }
+            }
           /* Read default domain name.  */
           if (MATCH (parser->buffer, "domain"))
             {