Like treeboy sais, the base rule at Eurobricks is that, unless you share the LXF, LDD MOCs should be posted in their respective themes. Since you share the LXF, you're in the right place
PS: The reason for this rule is that we don't want to split up MOCs in digital and real. For example if you post a MOC of a pirate ship, you probably want feedback from the pirate experts, and they tend to hang mostly in the Pirates forum. However, if you share the LXF, the file can be of interested to LDD builders, to examine and learn, and hence the MOC should be posted here in the LDD forum. At least that is the thought. There are exceptions to this rule, and that is for extraordinary LDD design work and/or for work that push the boundaries of what can be done in LDD.