After long testing I did come up with a sollution
lets say you wish to create a user which gets the currently logged in user and writes it to the database table that you created...
create table user---varchar32 in the database that you are currently using, then just add this to your (form) entry setup:
<input class="wct-formchar32" type="text" name="wctf_user" value="[wctphp]
echo echo $current_user->user_login;;
The date is set up as a date, in the tables the user is set up as a normal varchar32 field. With this method, you do not have to create "Own Db Field" (as I have never gotten them to work)