Is it possible to add some flag/property in objects.xml object list to make player's camera work with streamed object like as static object. (avoid collisions of object)
Yes. There is an <cameraavoids> option in objects' settings.
<special value="0"/>
<physics>
<mass>99999.0</mass>
<turnmass>0.000000</turnmass>
<airresistance>0.000000</airresistance>
<elasticity>0.000000</elasticity>
<percentsubmerged>0.000000</percentsubmerged>
<uprootlimit>0.000000</uprootlimit>
<damagemultiplier>0.000000</damagemultiplier>
<collisioneffect>0</collisioneffect>
<collisionresponse>0</collisionresponse>
<cameraavoids>true</cameraavoids>
</physics>